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DLT2000 SCSI Interface

8-86 DLT2000/DLT2700 Cartridge Tape Subsystem

8.4.10.8 Read/Write Error Recovery Page (01h)

The drive will support the Error Recovery Page, which has the following format:

Bit

Additional Page Length (0Ah)

rsvd

EER

PER

DTE

DCR

Byte

Read Retry Count

Page Code(01h)

Write Retry Count

Reserved

Figure 8-55 Error Recovery Page Format

Option Flags

•

TB–The Transfer Block (when not fully recovered) function is not supported.

•

EER–The Enable Early Recovery function is always enabled.

•

PER–The Post Error bit turns on reporting of Check Condition to report recovered
read/write errors. The default setting of this bit is off.

•

DTE–The Disable Transfer on Error feature is not supported so this bit will be
zero.

•

DCR–The Disable ECC Correction bit feature is not supported so this bit will be
zero.

Read Retry Count

This field reports the maximum number of rereads that are done before declaring an
unrecoverable error.

Summary of Contents for DLT 2000

Page 1: ...DLT2000 DLT2500 DLT2700 Cartridge Tape Subsystem Product Manual Date 19 January 96 Order Number 81 109132 03...

Page 2: ...n Number 81 109132 03 SERVICE CENTERS Quantum Service Center 715 Sycamore Avenue Milpitas California 95035 Phone 408 894 4000 Fax 408 894 3218 Quantum Gmbh Genferstrasse 4B 60437 Frankfurt am Main 56...

Page 3: ...4 Consult the dealer or an experienced radio TV technician for help The shielded interconnect cable shipped with the unit should not be altered or modified in any way The unit shipped without a shiel...

Page 4: ...rence in which case the user at his own expense will be required to take whatever measures may be required to correct the interference The shielded interconnect cable shipped with the unit should not...

Page 5: ...rt 2 1 2 2 2 Installation Setup 2 2 2 2 3 Site Setup 2 2 2 2 4 Site Guidelines 2 2 2 3 INSTALL THE SUBSYSTEM 2 4 2 4 CONFIGURE THE DLT2000 TABLETOP 2 4 2 4 1 Configuration Guidelines 2 4 2 4 2 DISABLE...

Page 6: ...G TAPE CARTRIDGE 3 23 3 9 UNLOADING A CARTRIDGE 3 24 3 10 PRESERVING CARTRIDGES 3 26 CHAPTER 4 CONFIGURING AND OPERATING THE DLT2500 MINI LIBRARY 4 1 IN THIS CHAPTER 4 1 4 2 INTRODUCTION TO THE MINI L...

Page 7: ...ION TO THE MINI LIBRARY 5 1 5 3 CONFIGURING THE DLT2700 5 2 5 3 1 Configuration Guidelines 5 3 5 3 2 Disable Parity Checking 5 3 5 3 3 Change the SCSI ID 5 3 5 4 MODE SELECT KEY 5 5 5 4 1 OCP Disabled...

Page 8: ...Before Doing the Procedure 7 2 7 3 CREATING A FIRMWARE UPDATE TAPE 7 4 7 3 1 On UN X Systems 7 4 7 4 FIRMWARE UPDATE PROCEDURE 7 5 7 4 1 Updating the Firmware on DLT2000 Drive Only Configuration 7 5...

Page 9: ...DE SELECT Parameter List 8 47 8 4 9 2 MODE SELECT Pages 8 50 8 4 9 3 Control Mode Page 0Ah 8 51 8 4 9 4 Data Compression Page 0Fh 8 53 8 4 9 5 Device Configuration Page 10h 8 55 8 4 9 6 Disconnect Rec...

Page 10: ...26 1 Header and Data Mode 8 127 8 4 26 2 Write Data 8 127 8 4 26 3 Download Microcode 8 127 8 4 26 4 Download Microcode and Save 8 127 8 4 27 WRITE FILEMARKS 10h 8 129 8 5 SUPPORTED SCSI 2 MEDIUM CHA...

Page 11: ...agnetic Radiated Susceptibility A 20 A 6 5 Radiated Susceptibility A 21 A 6 6 Conducted Susceptibility A 21 A 6 7 ESD Failure Level Limits A 22 A 6 8 Acoustic Noise Emissions A 22 A 7 REGULATORY REQUI...

Page 12: ...TE PROTECT SWITCH ON A CARTRIDGE 4 20 4 7 DLT2500 MAGAZINE 4 22 4 8 INSERTING A CARTRIDGE INTO THE MAGAZINE 4 24 4 9 REMOVING A CARTRIDGE FROM THE MAGAZINE 4 25 5 1 CHANGING THE SCSI ID VIA THE PUSHBU...

Page 13: ...AD WRITE BYTES TRANSFERRED LOG SENSE PAGE FORMAT 8 44 8 29 MODE SELECT CDB 8 46 8 30 MODE SELECT PARAMETER LIST 8 47 8 31 MODE SELECT PAGES SUPPORTED 8 50 8 32 CONTROL MODE PAGE 0AH 8 51 8 33 DATA COM...

Page 14: ...8 102 8 71 RESERVE UNIT CDB 8 112 8 72 RESERVE UNIT CDB 8 114 8 73 SEND DIAGNOSTIC CDB 8 115 8 74 SEND DIAGNOSTIC PARAMETER LIST FORMAT 8 117 8 75 SPACE CDB 8 120 8 76 SPACE CODE DEFINITION 8 120 8 7...

Page 15: ...em xv A 3 MOUNTING HOLE DIMENSIONS SIDE VIEW A 10 D 1 EEROM LOG AREA LAYOUT D 2 D 2 BUGCHECK LOG PACKET LAYOUT D 3 D 3 POST LOG PACKET LAYOUT D 4 D 4 EVENT LOG PACKET LAYOUT D 5 D 5 DIRECTORY R W ERRO...

Page 16: ...TO USE THE CLEANING CARTRIDGE 4 29 5 1 RESULTS OF DENSITY SELECTION USING A COMPACTAPE III TAPE 5 11 5 2 DLT2700 OPERATOR CONTROL PANEL 5 12 5 3 LOADER POWER ON SHELF TEST 5 15 5 4 LOAD UNLOAD FUNCTIO...

Page 17: ...A 17 A 17 NONOPERATING PACKAGED SHOCK DROP SPECIFICATIONS A 17 A 18 NONOPERATING UNPACKAGE VIBRATION SPECIFICATIONS A 17 A 19 NONOPERATING UNPACKAGED SHOCK SPECIFICATIONS A 18 A 20 CONDUCTED EMISSION...

Page 18: ...Table of Contents xviii DLT2000 DLT2500 DLT2700 Cartridge Tape Subsystem...

Page 19: ...tes and reasons for the revisions Manual No Rev Level Date Summary of Changes 81 109132 01 April 14 1995 Original issue 81 109132 02 August 18 1995 Specifications and illustrations were upgraded DLT25...

Page 20: ...Revision History xx DLT2000 DLT2500 DLT2700 Cartridge Tape Subsystem...

Page 21: ...ease send your comments to Technical Publications Quantum Corporation 333 South Street Shrewsbury MA 01545 Purpose of This Manual This manual is isssued for the DLT2000 Cartridge Tape drive and DLT250...

Page 22: ...T2700 Mini Library includes configuration selecting density and other operation information for the loader such as the power on process the loader Mode Select key the operator control panel and functi...

Page 23: ...drange and high end computing systems Using data compression and compaction the DLT2000 drive features a formatted capacity of 30 GB and a sustained user data transfer rate of 2 5 MB s The DLT2000 is...

Page 24: ...read 1 4 High Capacity The amount of data the user can store on a tape CompacTape III cartridge can be up to 10 0 GB native capacity or 20 0 GB compressed depending on whether you select compression...

Page 25: ...ompacTape III cartridge On a write from BOT the DLT2000 DLT2500 DLT2700 reformats the CompacTape III cartridge recorded at 2 6 6 0 or 10 0 GB format to the new specified format using the new specified...

Page 26: ...Overview and Features of the DLT2000 DLT2500 DLT2700 Product 1 4 DLT2000 DLT2500 DLT2700 Cartridge Tape Subsystem...

Page 27: ...6 DLT2000 Troubleshooting Chart 2 7 2 2 Prepare for the Installation This section describes how to prepare for the installation of the DLT2000 cartridge tape subsystem including Topic Section Before...

Page 28: ...for the DLT2000 tabletop subsystem 3 Power off the system on which the DLT2000 tabletop subsystem is to be installed 2 2 3 Site Setup Place the DLT2000 on a flat sturdy level area such as a desk or t...

Page 29: ...a n d l e U n l o a d T o L o a d T o U n l o a d P r e s s B u t t o n W a i t L i g h t O p e n t h i s H a n d l e R e m o v e T a p e W a i t L i g h t O p e n t h i s H a n d l e I n s e r t T a...

Page 30: ...on Guidelines 2 4 1 Disable Parity Checking 2 4 2 Changing the SCSI ID 2 4 3 The DLT2000 is factory set to SCSI ID 5 unless otherwise specified The drive is factory set for parity generation and check...

Page 31: ...the drive Press the switch button s above or below the number display 0 7 to set the desired SCSI ID Press the top button to increase the number or press the bottom button to decrease the number MLO 0...

Page 32: ...t Termination Power Switch Power Connector Figure 2 3 Rear Panel Components 2 5 2 Connect the SCSI Signal Cable To connect the SCSI signal cable 1 Connect one end of the SCSI cable to the leftmost SCS...

Page 33: ...ing to terminate the cables externally 1 Connect the SCSI terminator to one of the SCSI signal connectors on the DLT2000 rear panel 2 Snap the wire cable clamps into place or tighten screws whichever...

Page 34: ...ttom All lights stay on for a few seconds 2 All lights on the left front panel turn on at the same time for about three seconds and then turn off 3 The green Operate Handle the orange Write Protected...

Page 35: ...What to Do after POST Table 2 3 After POST If Then All the events in Table 2 2 took place POST succeeded Bring up the system and run the optional system tests See Chapter 3 for operating the drive and...

Page 36: ...r might be incorrect Check your SCSI adapter installation The SCSI signal cable might be loose Make sure the connector on each end of the cable is fully seated The SCSI terminator might not be present...

Page 37: ...r cord connections with the DLT2000 power switch off All right side or all left side indicators on the DLT2000 front panel blink A drive fault has occurred Press the Unload button on the DLT2000 front...

Page 38: ...Installing and Configuring the DLT2000 Tabletop Drive 2 12 DLT2000 DLT2500 DLT2700 Cartridge Tape Subsystem...

Page 39: ...sections Topic Section Before You Install the DLT2000 Drive 3 2 Overview of the Front Panel 3 4 Selecting Density 3 3 Description of Controls and Indicators 3 5 Description of the Tape Cartridge 3 6 L...

Page 40: ...you can disable parity checking by adding a jumper to the SCSI connector on the left side of the DLT2000 drive Figure 3 1 To disable parity 1 Use Figure 3 1 Number to locate the SCSI ID connector on...

Page 41: ...tor represent ID Pins LKG 9295 94F Remote ID Present Disable Parity Figure 3 2 SCSI ID Connector Pins _________________________ Note _____________________________ A jumper must always be placed on the...

Page 42: ...5 I Disable parity checking The jumper goes in this position with any SCSI ID you choose 3 2 2 Changing the SCSI ID The drive is shipped with SCSI ID 5 unless otherwise specified You can change the SC...

Page 43: ...oller module has active terminators The differential DLT2000 controller module does not have on board termination You can configure the single ended DLT2000 drive to supply termination power and termi...

Page 44: ...dge Tape Subsystem 3 2 4 Locating the SCSI Cable and Power Connectors To install the DLT2000 drive note the location of the rear connectors Figure 3 5 Rear A ZKO 1217 16 RGS 3 Rear B 1 2 Figure 3 5 DL...

Page 45: ...CompacTape III the user can select density by using any of the following operations 1 On all read operations and all write append operations the recorded density is the density to be used 2 On a Writ...

Page 46: ...f the following Change the density selection Unload the tape Density Select Example If you have loaded a tape with a prerecorded 2 6 density and you use the Density Select button to select 10 0 densit...

Page 47: ...sity and the Density Override light For example if the actual tape density is 10 0 GB and the selected tape density is 10 0 GB then the indicator next to 10 0 lights The Density Select button is used...

Page 48: ...v e T a p e W a i t L i g h t O p e n t h i s H a n d l e I n s e r t T a p e C l o s e t h i s H a n d l e Z K O 1 2 1 7 0 2 D G U s e 2 6 6 0 1 0 0 C o m p r e s s D e n s i t y O v e r r i d e D e...

Page 49: ...pe When the user pushes Unload the DLT2000 waits until an active write to tape is completed before beginning the unload sequence The drive then rewinds the tape back into the cartridge The tape must b...

Page 50: ...Basic Tape Drive 3 12 DLT2000 DLT2500 DLT2700 Cartridge Tape Subsystem 3 5 4 Indicator Action during Power On Self Test and Operation When you turn on system power the drive performs the power on sel...

Page 51: ...se light turns off 2 The green Operate Handle light turns on 3 The handle is unlatched 4 The drive beeps momentarily You can now raise the handle and insert a cartridge b A cartridge is present and th...

Page 52: ...ands However it might take longer for the media to become ready After a bus reset the tape drive responds within a bus selection timeout period Use this table to determine the drive s operating condit...

Page 53: ...Yellow On Blinking Tape is recorded in 2 6 format Tape is recorded in another density You selected this density for a write from BOT 6 0 Yellow On Blinking Tape is recorded in 6 0 format Tape is recor...

Page 54: ...e 3 16 DLT2000 DLT2500 DLT2700 Cartridge Tape Subsystem Table 3 4 Determining the Drive s Operating Condition cont d Label Color State Operating Condition Light Left Front Panel All four right side or...

Page 55: ...l erasure of data Before loading the tape cartridge into the drive position the write protect switch on the front of the cartridge Figure 3 7 Left so the cartridge is write protected Right so the cart...

Page 56: ...Tape Drive 3 18 DLT2000 DLT2500 DLT2700 Cartridge Tape Subsystem Figure 3 7 shows the write protect switch on the tape cartridge ORANGE INDICATOR WRITE PROTECTED WRITE Z K O 1 2 1 7 0 4 D G WRITE PROT...

Page 57: ...you move the write protect switch Then To the left the tape is write protected the orange indicator on the cartridge shows Data cannot be written to the tape To the right the tape is write enabled Dat...

Page 58: ...oading a cartridge Figure 3 8 1 When the green light is on steady pull the cartridge insert release handle open 2 Insert the cartridge 3 Push the cartridge into the drive 4 Push the handle closed The...

Page 59: ...ng the DLT2000 Basic Tape Drive DLT2000 DLT2500 DLT2700 Cartridge Tape Subsystem 3 21 Figure 3 8 shows how to load a cartridge into the drive Handle Unload Unload Z K O 1 2 1 7 1 0 D G 1 2 3 4 Figure...

Page 60: ...A cartridge is loaded but the tape is not moving This can mean no application is communicating with the controller or that the application is communicating but is not delivering commands for tape mot...

Page 61: ...emove the cleaning cartridge 2 A data cartridge causes Use Cleaning Tape to blink The data cartridge may be damaged Back up this data onto another cartridge Discard the old cartridge which may be dama...

Page 62: ..._____________________________________________ To unload a cartridge from the drive Figure 3 9 1 Press the Unload button or issue the appropriate system software command The yellow Tape in Use light bl...

Page 63: ...Configuring and Operating the DLT2000 Basic Tape Drive DLT2000 DLT2500 DLT2700 Cartridge Tape Subsystem 3 25 Unload Z K O 1 2 1 7 0 9 D G 1 2 3 4 Figure 3 9 Unloading a Cartridge...

Page 64: ...e life always store the cartridge in its plastic container and in room environment conditions of 72 F 7 F 22 C 4 C If the tape cartridge has been exposed to heat or cold extremes stabilize the cartrid...

Page 65: ...he mini library and its operation Chapter 4 includes these main topics and sections Topic Section Introduction to the Mini Library 4 2 Configure the DLT2500 Mini Library 4 3 Installation Test 4 4 Oper...

Page 66: ...figuring and Operating the DLT2500 Mini Library 4 2 DLT2000 DLT2500 DLT2700 Cartridge Tape Subsytem MLO 012160 Shipping Screw Locking Lever Figure 4 1 Loosening the Shipping Screw Under the Mini Libra...

Page 67: ...DLT2500 DLT2700 Cartridge Tape Subsytem 4 3 MLO 012863 Figure 4 2 Rotate the Locking Lever Lift the locking lever on the front of the mini library Figure 4 2 to rotate the magazine locking mechanism T...

Page 68: ...ring and Operating the DLT2500 Mini Library 4 4 DLT2000 DLT2500 DLT2700 Cartridge Tape Subsytem MLO 012002 Label Power Switch Power Connector Fan SCSI Connectors Figure 4 3 Mini Library Rear Panel Com...

Page 69: ...Configuring and Operating the DLT2500 Mini Library DLT2000 DLT2500 DLT2700 Cartridge Tape Subsytem 4 5 MLO 012131 Magazine Door Display Operator Buttons Key Lock Figure 4 4 Front of the DLT2500...

Page 70: ...led to the media stored in the magazine slots Sequential access is disabled to the media supported automatically in auto loading mode If you do not issue the SCSI 2 medium changer commands the default...

Page 71: ...t is unique from any other device or system ID on the SCSI bus If you need to change the SCSI ID see the section on setting the SCSI ID later in this chapter The last or only device on the SCSI bus Th...

Page 72: ...anel Ensure the sequence of events are the same as listed Event Action 1 The message LDR RST loader reset displays 2 The message LDR ACT loader active displays 3 A series of numbers display as the min...

Page 73: ...y DLT2000 DLT2500 DLT2700 Cartridge Tape Subsytem 4 9 4 5 Operator Control Panel The operator control panel OCP has 4 pushbuttons Figure 4 5 and Table 4 1 MLO 012191 Display Mode Select Load Unload Op...

Page 74: ...ts the current slot number on the display to the next slot number Load Unload Loads the currently selected cartridge into the tape drive Unloads the cartridge currently in the tape drive Resets the mi...

Page 75: ...ot moving DRV REW Tape is rewinding HC Use cleaning tape LDR RDY Power is on and no cartridge is in the drive LDR ACT Loader is moving a cartridge ERR MAG The status of cartridges reported by the load...

Page 76: ...mat Flashing means the tape is recorded in another density You selected this density for a write from BOT 6 Tape drive activity as follows On steady means the tape is recorded in 6 GB format Blinking...

Page 77: ...to open the door electronically ___________________________________________________________ 4 6 1 OCP Locked or Disabled When you insert the magazine into the mini library and close the magazine door...

Page 78: ...ny of the following 1 On a write from beginning of tape BOT tape density is selected by one of the following Front panel Density Select mode __________________________NOTE ____________________________...

Page 79: ...he density selection state until you do one of the following Change the density selection Press the Open button to open the door 3 Enter Density Select mode by pressing the Display Mode button and the...

Page 80: ...ensity differs from the density you selected On operation before Write from BOT the display shows 1 Actual tape density on steady 2 Selected density flashing 3 OVR flashing On operation after write fr...

Page 81: ...g this mode depends on the state of the mini library If the display says It means the LDR ACT Loader is active LDR RDY Loader is inactive and no cartridge is in the drive DRV RDY Drive is ready DRV AC...

Page 82: ...display says It means the DNS SEL Mini library is in Density Select mode OVR Front panel selection overrides host selection DRV RDY Drive is ready DRV ACT Drive is active DRV REW Tape is rewinding HC...

Page 83: ...SCSI ID is set to 0 SCSI ID 1 SCSI ID is set to 1 SCSI ID 2 SCSI ID is set to 2 SCSI ID 3 SCSI ID is set to 3 SCSI ID 4 SCSI ID is set to 4 SCSI ID 5 SCSI ID is set to 5 SCSI ID 6 SCSI ID is set to 6...

Page 84: ...o the Left so the cartridge is Write Protected Right so the cartridge is Write Enabled When you slide the switch to the left the small orange rectangle is visible This means data cannot be written to...

Page 85: ...age displays Table 4 4 describes what happens to data protection when you move the write protect switch before you load the cartridge Table 4 4 Before Loading the Cartridge If you move the write prote...

Page 86: ...front of the magazine has numbers 0 through 4 to indicate each slot number __________________________NOTE ____________________________ Insert and remove all cartridges at the front of the magazine __...

Page 87: ...zine Before cartridge insertion 1 Grasp the cartridge with the write protect switch on the right side facing you 2 Set the cartridge s write protect switch to the desired position If you want to Then...

Page 88: ...insert a cartridge into the magazine Figure 4 8 Place the magazine on a flat surface with the slots facing you Each slot is numbered to ensure you are inserting the cartridge correctly in the front of...

Page 89: ...Figure 4 9 Removing a Cartridge from the Magazine 4 10 2 Removing a Cartridge from the Magazine To remove a cartridge from the magazine Figure 4 9 At the front of the magazine where you can see the m...

Page 90: ...pen the door of the mini library Pressing just the Open button also returns the tape to the magazine and opens the door 2 Slide the door all the way to the left 3 Grasp the magazine s handle and pull...

Page 91: ...into the Drive To load the cartridge from the magazine into the drive press the Load Unload button Table 4 5 explains what happens after you press the button Table 4 5 After Loading the Cartridge Sta...

Page 92: ...the display reads LDR RDY The ERR LDR message displays showing a malfunction Press the Load Unload button to reset the mini library and try to clear the error 4 10 8 Opening the Magazine Door The Open...

Page 93: ...ive and returns to the magazine The LDR RDY message displays 2 A data cartridge causes the HC message to display frequently The data cartridge may be damaged Back up this data onto another cartridge D...

Page 94: ...Configuring and Operating the DLT2500 Mini Library 4 30 DLT2000 DLT2500 DLT2700 Cartridge Tape Subsytem...

Page 95: ...nctions 5 8 Magazine 5 9 5 2 Introduction to the Mini Library The mini library option includes a DLT2000 tape drive a media loader and a 7 cartridge removable magazine The same SCSI target controller...

Page 96: ...idge in the next slot is moved from the magazine into the drive and made ready The next slot is empty or the cartridge unloaded was for the last slot in the magazine No cartridge is loaded into the dr...

Page 97: ...e sure to use a SCSI ID that is unique from any other device or system ID on the SCSI bus The last or only device on the SCSI bus The user must terminate the bus by installing a terminator 5 3 2 Disab...

Page 98: ...500 DLT2700 Cartridge Tape Subsystem Figure 5 1 shows the location of the SCSI ID pushbutton switch Figure 5 1 Changing the SCSI ID via the Pushbutton Switch SCSI Connector Wire Cable Clamps Pushbutto...

Page 99: ...ne automatically loads into the drive When you copy data to the tape operations stop if one of the following happens Storage capacity of the last tape cartridge is exceeded No tape cartridge is in the...

Page 100: ...w e r O n T a p e I n U s e E j e c t L o a d U n l o a d S l o t S e l e c t Write Protected Loader Fault OPERATOR CONTROL PANEL ZKO 1217 18 DG CURRENT SLOT INDICATORS 0 6 M a g a z i n e Fault 0 1...

Page 101: ...eave the receiver unlocked set the Mode Select key to Automatic mode The following results of setting the Mode Select key to Automatic mode are The OCP pushbuttons are enabled SCSI media changer comma...

Page 102: ...turns to the magazine but the current Slot Select indicator does not advance forward to the next available cartridge ____________________________________________________________ 5 4 4 Service Mode Ser...

Page 103: ...g the Density Select button always overrides a host selection A programmable host selection via your operating system The Density Override light is off indicating automatic or host density selection N...

Page 104: ...orded 2 6 GB density and you use the Density Select button to select 10 0 GB density the following should happen The 2 6 light remains lit density has not changed yet and the steady light indicates re...

Page 105: ...ity you selected The actual density and Density Override light For example if the actual tape density is 10 0 GB and the selected tape density is 10 0 GB then the light next to 10 0 is on You select t...

Page 106: ...tape from the drive to the magazine if a tape is inserted Eject light Green Indicates you can press the Eject button to unload cartridges from the drive to the magazine and open the receiver Lights w...

Page 107: ...e is rewinding Rapid blinking indicates tape is reading or writing When on steadily indicates a cartridge is in the drive and the tape is not moving When off indicates no cartridge is in the drive Use...

Page 108: ...tape is recorded in 2 6 GB format Blinking tape is recorded in another density You selected this density for a write from BOT 6 0 Yellow Indicates tape drive activity as follows On steady tape is reco...

Page 109: ...ater all lights are on Within 15 seconds POST of the loader mechanics completes If the Magazine Fault and Loader Fault lights turn off loader POST succeeded If the Magazine Fault and Loader Fault ligh...

Page 110: ...DLT2500 DLT2700 Cartridge Tape Subsystem Table 5 3 Loader Power On Self Test cont d Phase What Happens 6 If the subsystem magazine has a cartridge in slot 0 and no cartridge is in the drive these lig...

Page 111: ...available slot After a successful initialization the DLT2700 subsystem automatically selects slot 0 and the Slot Select button becomes active The Load Unload and Eject lights remain on during slot se...

Page 112: ...oad light must be on before you press the Load Unload button to load or unload a cartridge ____________________________________________________________ If Then You want to unload the cartridge from th...

Page 113: ...e The Slot Select Load Unload and Eject lights are on before any operation begins Press the Eject button to turn off all lights The elevator then returns to its home position and the receiver opens A...

Page 114: ...rface with the slots facing you Figure 5 4 Each slot is numbered to ensure you are inserting the cartridge correctly in the front of the magazine Usually cartridges are inserted into consecutive slots...

Page 115: ...ting the DLT2700 Mini Library DLT2000 DLT2500 DLT2700 Cartridge Tape Subsystem 5 21 ORANGE INDICATOR WRITE PROTECTED WRITE Z K O 1 2 1 7 0 4 D G WRITE PROTECT SWITCH ENABLED Figure 5 3 Write Protect S...

Page 116: ...LT2000 DLT2500 DLT2700 Cartridge Tape Subsystem 1 2 3 SLOT NUMBERS 0 6 FRONT OF MAGAZINE ZKO 1217 05 DG BACK OF MAGAZINE 0 1 2 3 4 5 6 5 0 1 2 3 4 5 6 NOTE Push tape in until a click is heard 0 1 2 3...

Page 117: ...ver To remove the magazine from the receiver first ensure 1 The Power On light is on Figure 5 2 2 The Eject light is on It must be on before you can press the Eject button Then 1 Press the Eject butto...

Page 118: ...DLT2500 DLT2700 Cartridge Tape Subsystem 0 1 2 3 4 5 6 0 1 2 3 4 5 6 0 1 2 3 4 5 6 NOTE Push tape in until a click is heard 1 2 3 4 5 SLOT NUMBERS 0 6 FRONT OF MAGAZINE ZKO 1217 06 DG BACK OF MAGAZINE...

Page 119: ...r i t e P r o t e c t P o w e r O n U s e E j e c t L o a d U n l o a d S l o t S e l e c t D r i v e F a u l t L o a d F a u l t ZKO 3135 04 DG C l e a n i n g T a p e T a p e I n U s e D e n s i t...

Page 120: ...Configuring and Operating the DLT2700 Mini Library 5 26 DLT2000 DLT2500 DLT2700 Cartridge Tape Subsystem...

Page 121: ...onditions DLT2500 DLT2700 6 5 6 6 Power Problems 6 7 6 2 Conditions Necessary for Button Operation Be sure to review information in the previous chapters to ensure you are correctly operating the DLT2...

Page 122: ...the DLT2500 OCP buttons Table 6 1 DLT2500 OCP Button Conditions If you want to First ensure the Then you can press this button Select another slot in the magazine Magazine contains at least two cartr...

Page 123: ...tains at least one cartridge Load Unload light is on Load Unload Return the selected cartridge to its original slot in the magazine Load Unload light is on Load Unload Clear a magazine or loader fault...

Page 124: ...n as the one shown in Figure 6 1 __________________________Caution___________________________ Do not touch the exposed magnetic tape If the tape leader is not in the correct position use a new cartrid...

Page 125: ...e magazine and the magazine is not defective If you still cannot clear the error call your service representative 6 5 2 DLT2500 Loader Error Description The ERR LDR message tells you the mini library...

Page 126: ...on If you cannot resolve the fault call your service representative Loader Fault This condition most likely requires service from a service representative It is indicated when the Loader Fault light i...

Page 127: ...tab is found over an open slot 1 Reinsert the missing cartridge properly by pushing the tab aside and insert cartridge until it snaps into place If no cartridge is needed in this slot push one into t...

Page 128: ...bcode to light Loader Fault indicates errors in the loader transfer assembly controller module or drive The suspected fault location is indicated by the following slot lights Slots 4 and 0 a controlle...

Page 129: ...tridge Tape Subsystem family can automatically update the controller firmware directly from a tape containing the appropriate information The user places the subsystem into firmware Update Mode via th...

Page 130: ..._________________________________________ 7 2 1 1 Updating Firmware on a Standalone System The user can update the subsystem even when the subsystem is not attached to a SCSI bus that is a standalone...

Page 131: ...pe DLT2000 DLT2500 DLT2700 Cartridge Tape Subsystem 7 3 Left Side ZKO 1217 17 RGS Right Side 1 3 2 Front Bezel Front Bezel Figure 7 1 DLT2000 Subsystem Connectors TRM PWR TRM ENB Connector SCSI ID Con...

Page 132: ...Update Tape To do the firmware update you must have a CompacTape III cartridge with a copy of the firmware image This image must be byte written onto the tape in a 4K block format The image must be co...

Page 133: ...Drive and Loader Configuration Drive and loader configuration see Updating the Firmware on the DLT2700 Drive and Loader Configuration _________________________ Caution __________________________ Never...

Page 134: ...s Try the procedure again If the drive and controller are not properly communicating you cannot select firmware update 3 Once you have selected the firmware update mode insert a cartridge into the dri...

Page 135: ...5 When the drive code update is complete the drive resets and goes through Power On Self Test POST The process waits until the tape is reloaded at beginning of tape BOT 6 If the firmware image is val...

Page 136: ...means a successful update On the DLT2000 the media is placed into the cartridge the door is unlocked and the green Operate Handle indicator is turned on The firmware update cartridge is NOT unloaded...

Page 137: ...are update tape 2 The tape does not contain a valid image No update is attempted The Write Protect and Tape In Use indicators do not blink The drive resets and the tape stays loaded to signal the firm...

Page 138: ...seconds until the SCSI ID SEL message displays d Press and hold the Load Unload button until the SCSI ID SEL message starts to flash Immediately release the button and then press it again The CODE UPD...

Page 139: ...pe cartridge returns to the magazine The LDR RDY message displays 5 If the code update succeeds the mini library resets itself A magazine scan takes place 7 4 2 1 Interpreting the Results DLT2500 Code...

Page 140: ...artridge from the drive 2 Press the Open button to open the magazine door 3 Remove the magazine and close the door The mini library does an elevator scan 4 Open the door again The message LDR RDY disp...

Page 141: ...move the magazine and close the door The mini library does an elevator scan 4 Open the door again The message LDR RDY displays 5 Rebuild the valid image on a good cartridge 6 Try the code update proce...

Page 142: ...o do this a Remove any magazine in the DLT2700 loader receiver and close the receiver b Put the Mode Select key in Service Mode wrench icon c Press the Load Unload button on the operator control panel...

Page 143: ...update procedure goes faster if the magazine contains only the firmware update cartridge But the procedure still works if other cartridges are present 5 Press the Load Unload button to load the Firmw...

Page 144: ...pdate cartridge was the only tape cartridge in the magazine If six other cartridges are present the scan takes an extra minute or more 7 4 3 1 Interpreting the Results DLT2700 Code Update Two possible...

Page 145: ...so you can remove the cartridge This shows a successful firmware update The tape is NOT a valid firmware update tape No update is attempted Write Protect and Tape In Use do not blink The tape contains...

Page 146: ...Firmware Update From Tape 7 18 DLT2000 DLT2500 DLT2700 Cartridge Tape Subsystem...

Page 147: ...ansfer phases where the device writes data to the SCSI bus and checked during all information transfer phases where data is read from the bus Parity checking can be disabled Refer to Chapter 2 for det...

Page 148: ...command to any LUN from 1 to 7 Refer to MODE SELECT section in this chapter Unsupported LUNs will be treated as follows If the LUN specified in the IDENTIFY message is invalid the DLT2000 shall accept...

Page 149: ...ting ones will be left queued A LOAD command will not generate a Unit Attention for the initiator that issued the command since the transition to ready is synchronous 8 2 5 Behavior Around Power On an...

Page 150: ...erformance that will result ____________________________________________________________ The write data cache shall be written flushed to the media under the following circumstances When WRITE FILEMAR...

Page 151: ...ECK CONDITION 02 A contingent allegiance condition occurred The REQUEST SENSE command should be sent following this status to determine the nature of the event BUSY 08 The target is busy This status i...

Page 152: ...the initiator cannot perform any operation which would cause tape motion for example write read verify space and so forth These commands will return a CHECK CONDITION status with a DRIVE NOT READY se...

Page 153: ...he bus which most likely would result in undetected data corruption On properly configured SCSI buses parity errors should be extremely rare If any are detected they should be quickly addressed by imp...

Page 154: ...de In Out Description Section 06 Out ABORT ABORT 06h 0D Out ABORT TAG ABORT TAG 0Dh 0C Out BUS DEVICE RESET BUS DEVICE RESET 0Ch 0E Out CLEAR QUEUE CLEAR QUEUE 0Eh 00 In COMMAND COMPLETE COMMAND COMPL...

Page 155: ...to the BUS FREE state The drive then executes a hard reset which leaves it as if a Bus Reset had occurred All data in the write buffer will be flushed to the media CLEAR QUEUE 0Eh This message clears...

Page 156: ...tended Message Format The Extended Message Length specifies the length of the Extended Message plus the number of additional parameter bytes that are to follow The length does not include bytes 0 and...

Page 157: ...ge mechanism LINKED COMMAND COMPLETE 0Ah This message is sent from a target to an initiator to indicate that the execution of a linked command with the Flag bit zero is complete and that status has be...

Page 158: ...a selection the drive proceeds to the COMMAND phase provided ATN does not continue being asserted The NO OP message is ignored by the tape drive RESTORE POINTERS 03h This message is sent from a target...

Page 159: ...e SDTR message has the following format Byte 0 Byte 1 Byte 2 Byte 3 Byte 4 Extended Message Identifier 01h Length 3 Message Code 1 SDTR msg Transfer Period min 50 32h Transfer Req Ack Offset max 15 Fi...

Page 160: ...f the Command Descriptor Block contains the Flag and Link bits Use of these bits is entirely initiator dependent Setting the Link bit provides an automatic link to the next command bypassing the usual...

Page 161: ...LOAD UNLOAD 8 4 5 2B LOCATE 8 4 6 4C LOG SELECT 8 4 7 4D LOG SENSE 8 4 8 15 MODE SELECT 8 4 9 1A 5A MODE SENSE 8 4 10 1E PREVENT ALLOW MEDIUM REMOVAL 8 4 11 08 READ 8 4 12 05 READ BLOCK LIMITS 8 4 13...

Page 162: ...If the Immediate bit is set to zero the target will not return status until the selected operation has completed If the bit is set to one status will be returned as soon as the operation has been ini...

Page 163: ...condition before the drive reports CHECK CONDITION status the target will perform the INQUIRY and will not clear the UNIT ATTENTION condition EVPD The DLT2000 implements the Vital Product Data pages o...

Page 164: ...e 8 15 Vendor ID Quantum 16 31 Product ID DLT2000 32 35 Product Revision Level hhss 36 55 Vendor Unique bytes Figure 8 5 INQUIRY Response Data Peripheral Qualifier The tape drive returns one of the fo...

Page 165: ...ta Format Set to 2 Inquiry Data in SCSI 2 format Byte 4 Additional Length The tape drive sets this field to indicate the number of additional bytes of INQUIRY Response Data available Byte 6 All bits s...

Page 166: ..._____Note _____________________________ If a 5 cartridge media loader is attached to the tape drive the Product ID will indicate DLT2500 instead of DLT2000 If a 7 cartridge media loader is attached to...

Page 167: ...ware Version 48 Media Loader Hardware Version 49 Media Loader Mechanical Version 50 Media Loader Present flag 51 Module Revision 55 Figure 8 6 INQUIRY Vendor Unique Bytes Definition Vendor Specific In...

Page 168: ...dule Revision A four byte ASCII string represents the revision of the ECM module 8 4 4 3 Vital Product Data Pages The following figures show the information in the supported Vital Product Data Pages B...

Page 169: ...ttom of the DLT2000 It can be found on the bar code label The serial number is returned in ASCII Bit 7 6 5 4 3 2 1 0 0 Peripheral Qualifier Peripheral Device Type Byte 1 Page Code C0h 2 Reserved 3 Pag...

Page 170: ...ponse The DLT2000 controller generates INQUIRY Data on the Medium Changer LUN that is very similar to that of the tape drive LUN The key differences are Peripheral Device Type is set to 8 for SCSI 2 M...

Page 171: ...hen a media loader is attached If none of the media loader specific commands has been issued then the device will operate in the sequential mode of operation Once a media loader specific command has b...

Page 172: ...artridge is inserted the media is automatically loaded and positioned by the drive at BOM Logically the drive will be positioned at the beginning of Partition 0 If the Load bit is set and the media is...

Page 173: ...mand can be used to position back to the same logical position for high performance restore operations of particular blocks of data BT The Block Type bit indicates how the Block Address field is inter...

Page 174: ...der with information about log page format parameters and supported pages The command specific bits are used as follows PCR If Parameter Code Reset bit is set to 1 and parameter list length is 0 all a...

Page 175: ...odified When the PC field is set to 11b and the Parameter List Length field is 0 then all Current Cumulative Values will be reset to the Default Cumulative Values This is equivalent to clearing all lo...

Page 176: ...rameter value as the log parameters The following pages can be cleared in this manner Page Code Page Description 02h 03h 32h Write Error Counter Page Read Error Counter Page Compression ratio page Fig...

Page 177: ...rved Page Code Byte 1 Reserved 2 MSB Page Length 3 LSB Log Parameters 0 MSB Parameter Length 1 LSB 2 DU DS TSD ETC TMC Rsvd LP 3 Parameter Length Byte 4 MSB 5 Parameter Value 6 7 LSB Figure 8 15 Read...

Page 178: ...nd TSD Saving parameters is not supported they both should be set to 1 If the DS and or TSD are set to zero the command is terminated with CHECK CONDITION status with the sense key set to ILLEGAL REQU...

Page 179: ...ameter The following conditions constitute errors in the parameter block that will cause the drive to return CHECK CONDITION with the sense data set to ILLEGAL REQUEST and additional sense code INVALI...

Page 180: ...that the parameter data requested from the device will start with the parameter code specified in the Parameter Pointer field and return the number of bytes specified in the Allocation Length field in...

Page 181: ...LOG Page Control Definitions The Default Threshold Values are the maximum values that each parameter can attain The Current Cumulative Values are the values computed since the last reset of the devic...

Page 182: ...rminate the command with CHECK CONDITION status The sense key is set to ILLEGAL REQUEST and the additional sense code is set to INVALID FIELD IN CDB __________________________Note ____________________...

Page 183: ...age Page 0 When page 0 is requested the 4 byte page header is returned followed by the pages supported in ascending order one byte for each Bit 7 6 5 4 3 2 1 0 0 Reserved Page Code 00h Byte 1 Reserved...

Page 184: ...DU DS TSD ETC TMC Rsvd LP 3 Parameter Length Byte 4 MSB Parameter Value 11 LSB Figure 8 21 Read Write Error Log SENSE Page Format Page Code The Page Code echoes the page code that was specific in the...

Page 185: ...is bit is set by the drive when accumulated values reach maximum This is also returned set if the host set the bit in the last LOG SELECT command The default is zero _________________________ Note ___...

Page 186: ...arameter code criteria is met ____________________________________________________________ Code Basis of Comparison Every update of the cumulative value equal to threshold value 00b 01b 10b 11b Cumula...

Page 187: ...ater than the Parameter Number specified in the CDB Parameter Code Parameter code values are assigned from 0 to 27 where 0 would be the oldest event stored and the highest parameter code returned woul...

Page 188: ...iption 00h Read Compression Ratio 100 01h Write Compression Ratio 100 02h MBytes Transferred to Host 03h Bytes Transferred to Host 04h MBytes Read from Tape 05h Bytes Read from Tape 06h MBytes Transfe...

Page 189: ...his bit is always zero DS Disable Save Saving parameters is not supported this bit will always be set to 1 TSD Target Save Disable Saving parameters is not supported this bit will always be set to 1 E...

Page 190: ...s bit is always a zero TMC Threshold Met Criteria Always a zero LP List Parameter This bit will always be set to zero as we treat the parameter codes as data counter Counter Value These parameter code...

Page 191: ...or to the buffer Parameter code 06 reports the number of full megabytes transferred Parameter code 07 reports the number of bytes less than a full megabyte that has been transferred Multiplying the co...

Page 192: ...e to the host s preferred configuration The drive always powers up with its default configurations set This is also true if the drive receives a BUS DEVICE RESET message or a hard reset through the RS...

Page 193: ...Byte 1 Media Type 2 WP Buffered Mode Speed 3 Block Descriptor Length 08h Block Descriptor 0 Density Code 1 MSB 2 Number of Blocks 000000h 3 LSB Byte 4 Reserved 5 MSB 6 Block Length 7 LSB Page Descript...

Page 194: ...led not having buffered mode enabled will cause some capacity loss depending on compression ratios This is because the block packing feature is essentially disabled by turning off buffered mode If thi...

Page 195: ...supported by the specific media For CompacTape III it is 20 GB with compression ___________________________________________________________ Number of Blocks This MODE SENSE field will be sent as zero...

Page 196: ...s reserved For the MODE SENSE command a Parameters Savable PS bit of one indicates that the page can be saved in nonvolatile memory by the drive If the PS bit is zero the supported parameters cannot b...

Page 197: ...trol Mode Page 0Ah A report log exception condition RLEC bit of one specifies the target shall report log exception conditions An RLEC bit of zero specifies the target shall not report log exception c...

Page 198: ...orithm Modifier This field must be 0 QErr Queue Error This bit must be 0 DQue Disable Queuing This bit must be 0 EECA Enable Extended Contingent Allegiance The DLT2000 does not support extended contin...

Page 199: ...Reserved DDE LSB 12 15 2 MSB 3 MSB 4 7 8 Figure 8 33 Data Compression Page 0Fh Page Code The Page Code identifies the type of MODE SELECT page being transferred This is the Data Compression Page The...

Page 200: ...CE bit byte 02 bit 7 is 1 The only value currently supported for this field is 10h __________________________Note _____________________________ Specifying a value other than 10h for this field causes...

Page 201: ...C SOCF RBO EEG SEW Reserved Buffer Size at Early Warning optional DBR 0 CAF Reserved 1 MSB Gap Size BIS Write Buffer Full Ratio REW Select Data Compression Algorithm EOD Defined 2 MSB Read Buffer Empt...

Page 202: ...cause data to be written sooner than the Write Delay time would indicate The Write Delay Time defaults to 200 C8h This causes the buffer to be flushed in 20 seconds Maximum value is 6500 1964h and th...

Page 203: ...t EW is not supported and must be zero Select Data Compression Algorithm One enables data compression a zero disables it The front panel setting will override what is specified in the MODE SELECT but...

Page 204: ...Reserved 2 Bus Inactivity Limit MSB LSB Maximum Burst Size Reserved 3 Reserved MSB LSB 4 5 6 7 8 9 10 11 12 13 14 15 Figure 8 35 Disconnect Reconnect Page Format In this page only the Maximum Burst Si...

Page 205: ...not attempt to disconnect once the data transfer of a command has started until all data the command is to transfer has been transferred 10b Reserved 11b A target does not attempt to disconnect once t...

Page 206: ...itions are supported this field must be zero Additional Partitions Defined The field specifies the number of additional partitions to be defined for the tape based on the settings of the SDP and IDP b...

Page 207: ...meter is changeable If PER is set Check Conditions will be created with Sense Key of Recovered Error and VU Sense Data detailing the cause Normally these events should be rare and only occur if the re...

Page 208: ...stem Read Retry Count This field reports the maximum number of rereads that are done before declaring an unrecoverable error Write Retry Count This field reports the maximum number of overwrite retrie...

Page 209: ...t command It has the following format 0 PS 0 Page Code Additional Page Length ASCII String of parameter name and value 1 2 Figure 8 39 EEROM Vendor Unique Page Format The ASCII string has a parameter...

Page 210: ...on powerup reset 1 Compression defaulted to on on powerup reset DEFFIXEDBLKLEN ASCII Decimal 0 0 8 Default fixed block size ENBINQMEDCHGR ASCII Binary 0 0 1 0 disable media changer bit 1 enable media...

Page 211: ...r FOURLAMPMODEL ASCII Binary 0 1 1 If turned on front panel SELECT button can only select 2 6 GB 10 0 GB or Compress done with 10 0 GB only PROTECTDIRONWP ASCII Binary 0 0 1 To protect tape directory...

Page 212: ...CII Binary 0 0 1 To make variable Read command handled as if the SILI bit is set if set CACHETMS ASCII Decimal 0 0 1 0 1 Don t cache filemarks unless Imm bit is 1 2 Cache if not 2 in a row unless Imm...

Page 213: ...EEROM vendor unique page that will modify the VENDORID parameter to XXXYY 0 0 0 Page Code 3EH Page Length 0FH v 76H 10 or 00H 1 e 65H 11 2 n 6EH 12 3 d 64H 13 4 o 6FH 14 5 r 72H 15 6 i 69H 16 7 d 64H...

Page 214: ...EEROM vendor unique page that will modify the FORCEDENSITY parameter to 1 0 0 0 Page Code 3EH Page Length 0FH F 46H 10 or 00H 1 O 4FH 11 2 R 52H 12 3 C 43H 13 4 E 45H 14 5 D 44H 15 6 E 45H 16 7 N 4EH...

Page 215: ...meters Page Parameter Default Minimum Maximum Header Buffered Mode Device Specific Byte 1 0 1 Block Descriptor Length 08h 00h 08h Block Descriptor Block Length 2 6 GB and 6 0 GB mode 10 0 GB and 20 0...

Page 216: ...on Code 1Ah Logical Unit Number Reser DBD Reserved Byte PC Page Code Reserved Allocation Length Unused Flag Link 4 1 Reserved 2 3 4 5 Figure 8 42 MODE SENSE CDB 6 The DLT2000 products also support the...

Page 217: ...tor Data If set then the Block Descriptor information is not returned PC The Page Control field indicates the type of page parameter values to be returned to the host as shown in the following table P...

Page 218: ...location Length The Allocation Length field specifies the number of bytes that the host has allocated for returned MODE SENSE data An Allocation Length of zero means that the drive will return no MODE...

Page 219: ...6 5 4 3 2 1 0 Byte 0 Sense Data Length 1 Media Type 2 WP Buffered Mode Speed 0 3 Block Descriptor Length 08h LSB Figure 8 45 MODE SENSE 6 Data Header The MODE SENSE 10 data contains an 8 byte header f...

Page 220: ...de Byte 1 Additional Page Length 2 Page Defined or Vendor Unique Parameter Bytes Figure 8 48 MODE SENSE Page Descriptor Data Length The Sense Data Length specifies the length in bytes of the following...

Page 221: ...t speed Block Descriptor Length This specifies the length in bytes of all the block descriptors Since the drive only allows one block descriptor this value will be 8 Density Code This field matches th...

Page 222: ...bytes of each logical block transferred over the SCSI bus A block length of zero indicates that the length is variable as specified in the I O command Any other value indicates the number of bytes per...

Page 223: ...10h Device Configuration Both 02h Disconnect Reconnect Both 01h Error Recovery Page Both 11h Medium Partition Both 3Eh EEPROM parameter Both 3Fh All Pages Sense Figure 8 49 MODE SENSE Pages Supported...

Page 224: ...de The Page Code identifies the type of MODE SENSE page being transferred The value returned for the Page Code is 0Ah Control Mode Page Page Length The Page Length indicates the number of bytes in the...

Page 225: ...AENP Ready AEN Permission The DLT2000 does not support asynchronous event notification AEN so the value returned for this field is 0 UAAENP Unit Attention AEN Permission The DLT2000 does not support a...

Page 226: ...ion MSB LSB RSmk AVC SOCF RBO EEG SEW Reserv ed Buffer Size at Early Warning optional PS 0 CAF Reserved 1 Gap Size BIS Write Buffer Full Ratio MSB REW Select Data Compression Algorithm DBR 2 Read Buff...

Page 227: ...defaults to 200 C8h This causes the buffer to be flushed in 20 seconds Maximum value is 6500 1964h and the minimum is 15 Fh This represents delays from almost 11 minutes down to 1 5 seconds Byte 8 DBR...

Page 228: ...2 15 2 MSB 3 MSB 4 7 8 Figure 8 52 Data Compression Page PS Parameters Savable The Parameters Savable bit indicates if the MODE SENSE parameter data contained in this page is savable The DLT2000 does...

Page 229: ...a Decompression Enable bit indicates whether data decompression is enabled or disabled as follows 0 Data decompression is disabled 1 Data decompression is enabled When the DLT2000 reads compressed dat...

Page 230: ...ity Limit MSB LSB Maximum Burst Size Reserved 3 Reserved MSB LSB 4 5 6 7 8 9 10 11 12 13 14 15 Figure 8 53 Disconnect Reconnect Page Format The following parameters in this page are supported Maximum...

Page 231: ...onal partitions are supported this field will be zero Additional Partitions Defined The field specifies the number of additional partitions to be defined for the tape based on the settings of the SDP...

Page 232: ...10 11 Figure 8 55 Error Recovery Page Format Option Flags TB The Transfer Block when not fully recovered function is not supported EER The Enable Early Recovery function is always enabled PER The Post...

Page 233: ...000 SCSI Interface DLT2000 DLT2700 Cartridge Tape Subsystem 8 87 Write Retry Count This field reports the maximum number of overwrite retries that will be performed before declaring an unrecoverable e...

Page 234: ...f a 6 byte MODE SENSE command is used to retrieve the EEROM parameter page the data returned is as follows Send a 10 byte MODE SENSE command to get the Parameter List The data returned by the 10 byte...

Page 235: ...panel is effectively disabled and the UNLOAD command will not unload the media or the cartridge The Prevent Allow status in the device is maintained separately for each initiator When the Prevent bit...

Page 236: ...the Transfer Length specifies the number of blocks to be transferred to the initiator This is valid only if the logical unit is currently operating in Fixed Block mode When the Transfer Length is zero...

Page 237: ...the Filemark EOM side If the drive detects EOD during the READ the drive will return a CHECK CONDITION status Within the Sense data the Valid bit is set and the Sense Key field is set to BLANK CHECK T...

Page 238: ...The command does not reflect the currently selected block size only the available limits MODE SENSE returns the current block size Bit 7 6 5 4 3 2 1 0 0 Reserved MSB Maximum block length Byte LSB Mini...

Page 239: ...ting the drive s data buffer and the SCSI bus integrity Mode The drive supports the following values within the field If any nonsupported value is set the drive terminates the command with a CHECK CON...

Page 240: ...e 8 62 READ BUFFER Data Head Available Length The Available Length field specifies the total number of data bytes available in the target s buffer This number is not reduced to reflect the allocation...

Page 241: ...DLT2000 SCSI Interface DLT2000 DLT2700 Cartridge Tape Subsystem 8 95 Bit 7 6 5 4 3 2 1 0 0 Offset Boundary 0Ch Byte 1 MSB 2 Buffer Capacity 3 4 LSB Figure 8 63 READ BUFFER Descriptor...

Page 242: ...uses this identifier to position back to this same logical position in a high performance fashion BT The Block Type bit indicates how the position is interpreted Since this device uses the same logic...

Page 243: ...Reserved Number of Blocks in Buffer Reserved 1 Partition Number MSB Last LSB Number of Bytes in Buffer 2 3 MSB LSB 4 MSB LSB 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Figure 8 65 READ POSITION Data Form...

Page 244: ...ddress associated with the current physical position the next block to be transferred to the media and from the target s buffer If the buffer is empty or has only a partial block the same value as Fir...

Page 245: ...the initiator after completion of a SEND DIAGNOSTIC command The following data will be returned by this command A REQUEST SENSE command should be issued to obtain more detailed information following...

Page 246: ...ption for RELEASE UNIT allows an initiator to release a logical unit that was previously reserved using the third party reservation option If the third party 3rdPty bit is zero then the third party re...

Page 247: ...Key Additional Sense Code and Additional Sense Code Qualifier The positional information provided reflects the logical position of the drive The drive returns information based on the nondiagnostic d...

Page 248: ...Sense Key 3 MSB 4 5 Information Bytes 6 LSB Byte 7 Additional Sense Length 8 MSB 9 10 Command Specific Information Bytes 11 LSB 12 Additional Sense Code 13 Additional Sense Code Qualifier 14 Sub Asse...

Page 249: ...This bit indicates that the current command has read a Filemark EOM This bit indicates that an End of Medium condition End of Partition or Beginning of Partition exists The warning is also given by s...

Page 250: ...Command Specific Information Bytes Command Specific Bytes are handled as device specific and can be logged by the operating system on error conditions On media errors this usually contains the curren...

Page 251: ...number of tape motion hours that is the head wear hours Format is represented in a hex decimal word 2 bytes Power On Hours Report the total hours the drive power has been on Format is represented in a...

Page 252: ...e Additional Sense Code Qualifier fields may provide more specific information 5h Illegal Request The CDB or supplied parameter data had an unsupported or illegal operation specified Check bytes 15 16...

Page 253: ...Encountered Beginning of Medium Encountered EOD Encountered 04h 00h 01h 02h 03h Unit not ready Cause nonreportable Calibration in process Load command needed Manual Intervention needed 08h 00h 01h LUN...

Page 254: ...rive Insufficient resources Invalid offset Invalid size Image data over limit Image personality is bad Not immediate command Bad drive servo image EDC Invalid personality for CUP Bad controller image...

Page 255: ...nded Parameter 39h 00h Saving Parameters Not Supported 3Ah 00h 80h Media Not Present VU Cartridge Missing 3Bh 00h 08h 0Dh 0Eh Sequential Positioning Error Reposition Error Media Destination Element Fu...

Page 256: ...xplained Residue in TC Registers Immediate data transfer timeout Insufficient CDB bytes Disconnect SDP sequence failed Bus DMA Transfer Timeout EEPROM copy 1 area bad EEPROM copy 2 area bad Both EEPRO...

Page 257: ...onal Sense Codes Qualifiers Used Cont d ASC ASCQ Description 5Bh 01h 02h Threshold Condition Met Log Counter at Maximum 80h 00h 01h 02h Calibration Error Cleaning Required Cleaning Requested 81h 00h D...

Page 258: ...HECK CONDITION status with a sense key of UNIT ATTENTION on the next command following the condition It is not an error to issue RESERVE UNIT to a drive that is currently reserved to the requesting in...

Page 259: ...another RESERVE UNIT to the drive 8 4 19 1 Medium Changer Considerations The optional Element reservation feature defined for Medium Changer devices in SCSI 2 is not supported so the RESERVE command i...

Page 260: ...drive to position the tape at the beginning of the currently active partition Before rewinding the drive writes any write data that is buffered to the tape and appends an EOD marker Immed If the Imme...

Page 261: ...perly This is the premise this test is based on that full power up testing is not necessary Therefore this test does an extension of the power up self tests The code ROM EDC is verified two queues use...

Page 262: ...calibration is not required This test is specified by setting the Self Test and UnitOfL bits and zeroing the DevOfL bit This test can accept a parameter list specifying test variables as shown in the...

Page 263: ...gal combination 0 1 1 Self Test 2 with default parameters 1 0 0 Self Test 1 with default parameters 1 0 1 Self Test 2 with default parameters 1 1 0 Self Test 1 with default parameters 1 1 1 Self Test...

Page 264: ...cifies how many blocks to write read starting first on track 0 then again on track 1 So if the Block Size and Count fields result in 3 tracks worth of data the test will Write tracks 0 1 2 Rewind read...

Page 265: ...more specific information 5h ILLEGAL REQUEST Illegal bit settings in the SEND DIAGNOSTIC command Eh Miscompare A compare error occurred during a read Table 8 10 Additional Sense Codes Additional Sense...

Page 266: ...functions that are determined by Code and Count fields in the Command Descriptor Block Both forward toward EOM P and reverse toward BOM P positioning are provided Code The code is defined as follows S...

Page 267: ...ing to EOD the Count field is ignored Forward movement occurs until the drive encounters EOD The position is such that a subsequent WRITE command would append data after the last object that has been...

Page 268: ...If the drive has a tape loaded the command returns a GOOD status Otherwise CHECK CONDITION is reported It is possible to get multiple check conditions on a TEST UNIT READY command because of power cy...

Page 269: ...ks beginning with the next block on the tape Both CRC and EDCs are validated Immed If this bit is set the Verify command will complete before any media movement is done that is when processing has bee...

Page 270: ...r The drive flushes the write buffer to tape under the following conditions The write hold off time limit is exceeded See MODE SELECT command Receipt of the following nonwrite commands LOAD UNLOAD REW...

Page 271: ...fined in the MODE SELECT command Upon termination the tape is logically positioned after these blocks Transfer Length This field contains the length of the data transfer in bytes or blocks depending o...

Page 272: ...ace hardware and SCSI bus integrity It is also used for downloading and updating controller microcode firmware Mode The drive supports the following values within the field If any other value is set t...

Page 273: ...nloading of an image This is to safeguard against accidentally starting a firmware update If a cartridge is loaded when all or part of a firmware image has been downloaded another WRITE BUFFER with Do...

Page 274: ...powerfail occurs or if the reprogramming fails part way through the subsystem will be unusable and the controller board will need to be replaced _______________________________________________________...

Page 275: ...e command descriptor block has been validated unless the filemark count is zero or greater than 1 since both cause the write buffer to be flushed to media An Immed bit of zero indicates the status wil...

Page 276: ...l Sense Code Qualifier fields are set to EOM P detected The drive will attempt to complete any subsequent WRITE FILEMARKS returning a CHECK CONDITION status in each case If the drive encounters the ph...

Page 277: ...SELECT 8 5 3 1A MODE SENSE 8 5 3 A5 MOVE MEDIUM 8 5 4 3C READ BUFFER 8 4 14 B8 READ ELEMENT STATUS 8 5 2 1C RECEIVE DIAG RESULTS 8 4 16 17 RELEASE 8 4 17 03 REQUEST SENSE 8 4 18 16 RESERVE 8 4 19 1D...

Page 278: ...TIALIZE ELEMENT STATUS 07h Bit 7 6 5 4 3 2 1 0 0 Operation Code 07h Logical Unit Number Reserved Reserved Byte Flag Link Unused 1 Reserved 2 Reserved 3 Reserved 4 5 Figure 8 83 Initialize Element Stat...

Page 279: ...nt not supported Data Transfer Element tape drive reserved Figure 8 85 Element Type Code Definitions The format of Element Status data is defined in the SCSI 2 specification The following sections sho...

Page 280: ...Tape Subsystem 8 5 2 1 Element Status Data Header Bit 7 6 5 4 3 2 1 0 0 MSB First Element Address Reported 1 LSB 2 MSB Number of Elements Reported Byte 3 LSB 4 Reserved 5 MSB 6 Byte Count of Report A...

Page 281: ...B Descriptor 8 MSB 9 Transport Element Address 01h LSB 10 Reserved Except Rsv d Full 11 Reserved 12 Additional Sense Code 13 Additional Sense Code Qualifier 14 Reserved Byte 15 Reserved 16 Reserved 17...

Page 282: ...Reserved Byte 15 Reserved 16 Reserved 17 SValid Invert Reserved 18 MSB 19 Source Element Address LSB 20 Reserved 21 Reserved 22 Reserved 23 Reserved 24 Density Code of Media 0 if empty VU 25 Unused VU...

Page 283: ...DLT2000 SCSI Interface DLT2000 DLT2700 Cartridge Tape Subsystem 8 137 The Source Element Address will always be set to this element s address...

Page 284: ...r 14 NotBus Rsvd IDValid LUValid Rsvd Logical Unit Number Byte 15 SCSI Bus Address same as tape drive s 16 Reserved 17 SValid Invert Reserved 18 MSB Source Element Address 19 LSB 20 Reserved 21 Reserv...

Page 285: ...E ST IE MT 7 Reserved DT DT DT I E DT ST DT MT 8 Reserved 9 Reserved 10 Reserved 11 Reserved 12 Reserved MT DT MT I E MT ST MT MT 13 Reserved ST DT ST I E ST ST ST MT 14 Reserved IE DT IE I E IE T IE...

Page 286: ...DLT2000 SCSI Interface 8 140 DLT2000 DLT2700 Cartridge Tape Subsystem The medium changer does not support ST ST or DT DT...

Page 287: ...2 MSB 1st Medium Transport Element Address 01h 3 LSB 4 MSB Number of Medium Transport Elements 1 5 LSB 6 MSB 1st Storage Element Address 100h 7 LSB 8 MSB Number of Storage Elements 9 LSB Byte 10 MSB 1...

Page 288: ...Medium Transport Element 2 0Fh Reserved 10h Data Transfer Element tape drive 11h 0FFh Reserved 100h Medium Storage Element Magazine slot 0 101h Medium Storage Element Magazine slot 1 102h Medium Stora...

Page 289: ...has the following format Bit 7 6 5 4 3 2 1 0 0 PS 0 Page Code 1Eh Byte 1 Additional Page Length 02h 2 Reserved Rotate 3 Member Number in Transport Element Set 0 Figure 8 92 Transport Geometry Page For...

Page 290: ...lement Address 3 LSB Byte 4 MSB Source Address 5 LSB 6 MSB Destination Address 7 LSB 8 Reserved 9 Reserved 10 Reserved 11 Unused Reserved Flag Link Figure 8 93 MOVE MEDIUM CDB The Move Medium command...

Page 291: ...DLT2000 SCSI Interface DLT2000 DLT2700 Cartridge Tape Subsystem 8 145...

Page 292: ...00 tape drive and the DLT2500 DLT2700 mini library including Topic Section Physical Description A 2 Performance Specifications A 3 Environmental Specifications A 4 Vibration and Shock Specifications A...

Page 293: ...13 08 in 243 8 mm 9 6 in including the bezel Weight 2 9 kg 6 lb 7 oz 7 1 kg 15 b 9 0 oz Shipping Weight 3 86 kg 8 lb 8 oz depending on configuration 10 85 kg 23 lb depending on configuration Environme...

Page 294: ...irements D C A C 22 W steady state 33 W maximum 50W maximum Power Consumption 5 Volt Bus 2 5 A steady state 3 0 A maximum N A 12 Volt Bus 0 8 A steady state 3 0 A maximum N A Communication interface S...

Page 295: ...not correct contact your authorized Quantum service representative The AC power cord used with this equipment must meet the following criteria 1 UL and CSA Certified cordage rated for use at 250 VAC w...

Page 296: ...Technical Specifications DLT2000 DLT2500 DLT2700 Cartridge Tape Subsystem A 5 Figure A 1 shows the different AC power cord plug configurations for 115V and 220V 240V usage Figure A 1 Power Cords...

Page 297: ...e 2 7 RLL code DLT2000 format MFM with DLT260 and DLT600 formats Form Factor 5 inch F H modified depth Transfer Rate Raw Native 1 7 MBytes second2 Transfer Rate User Native Uncompressed 1 25 MBytes se...

Page 298: ...ing 20 to 80 noncondensing 20 to 80 noncondensing Nonoperating 10 to 95 10 to 95 Certifications EMI Meets CEmark Class A VCCi Class 1 CISPR 22 Class A FCC Class A devices Meets CEmark Class A VCCi Cla...

Page 299: ...150 8 F Humidity Operating 20 to 80 noncondensing 20 to 80 noncondensing Nonoperating 10 to 95 10 to 95 Certifications EMI Meets CEmark Class A VCCi Class 1 CISPR 22 Class A FCC Class A devices Meets...

Page 300: ...of the DLT2000 drive 5 700 144 78 3 125 79 38 Z K O 1 2 1 7 1 1 D G 100 2 54 5 500 139 70 1 875 47 63 5 84 148 3 Figure A 2 Mounting Hole Dimensions Top View Tape drive width and height are standard...

Page 301: ...stem Figure A 3 shows the mounting holes and dimensions in a side view of the DLT2000 drive 3 250 82 55 820 20 83 3 125 79 38 9 000 228 60 9 600 243 84 25 8X 6 32UNC 2B 6 4 FULL THREAD Z K O 1 2 1 7 1...

Page 302: ...is 3 0 1 oz when stationary 4 7 1 oz at operating speed A 3 2 DLT2000 Timing Characteristics Table A 5 lists timing characteristics of the DLT2000 tape drive Table A 5 DLT2000 Timing Characteristics...

Page 303: ...48 0 sec Unload media from drive to cartridge from BOT 17 0 sec A 3 4 DLT2700 Media Loader Timing Characteristics Table A 7 lists timing characteristics of the DLT2700 media loader Table A 7 DLT2700...

Page 304: ...conditioning Uncontrolled tolerances Systems inadequate to maintain constant comfort levels for example marginal offices and work spaces A 4 1 Temperature and Humidity Table A 8 lists the operating t...

Page 305: ...ture shock 15 C with 5 margin over two min Relative humidity 10 to 95 noncondensing Humidity gradient 10 h Table A 11 lists the shipment ranges Table A 11 Shipment Ranges Dry bulb temperature 40 to 66...

Page 306: ...fications Vibration type Sine Sweep Frequency range 5 500 5 Hz Upward and downward sweep Acceleration level 0 25 g 0 010 DA Between 5 and 22 Hz crossover Between 22 and 500 Hz Application X Y and Z ax...

Page 307: ...list nonoperating vibration and nonoperating shock specifications for the product in its shipping packaging Table A 15 Nonoperating Packaged Vibration Specifications Vibration type Random vibration Fr...

Page 308: ...Drop shock Drop height 30 in items 20 9 lbs 24 in 21 items 40 9 lbs 18 in 41 items 60 9 lbs 12 in 61 items 100 lbs Application 10 drops total 1 each side 3 edges 1 corner Table A 18 Nonoperating Unpac...

Page 309: ...onoperating Unpackaged Shock Specifications Nonoperating Unpackaged Pulse shape Square wave Peak acceleration 40 G Duration 180 in sec Application X Y and Z axes twice in each axis Pulse shape 1 2 sin...

Page 310: ...ty A 6 5 Conducted Susceptibility A 6 6 ESD Failure Level Limits A 6 7 Acoustic Noise Emissions A 6 8 A 6 1 Electromagnetic Emissions Electromagnetic emissions include CSA 108 8 EEC Directive 89 336 E...

Page 311: ...of radiated interference field strength in the frequency range from 30 MHz to 30 GHz at a test distance of 3 and 10 meters for Class B equipment are listed in table A 21 Table A 21 Radiated Emissions...

Page 312: ...r and data cables Table A 24 Fast Transient Bursts for Power and Data Cables 2 kV S W recoverable errors No hardware failures Table A 25 lists power cable voltage limits Table A 25 High Energy Transie...

Page 313: ...ustic noise emission levels Table A 28 Acoustic Noise Emissions Nominal Noise Power Emission Level LNPEc Mode DLT2000 Drive DLT2000 Tabletop DLT2700 Loader Idle N A 4 3 bels 5 1 bels Streaming N A 4 9...

Page 314: ...bsystem A 23 Table A 28 Acoustic Noise Declaration for German Noise Declaration Law Cont d Generic Product Option Numbers Description TH3xx DLT2000 drive TH3Bx DLT2000 table top drive TH3Ex DLT2700 ca...

Page 315: ...ements include UL1950 Information Technology Including Electrical Business Equipment CSA C22 2 220 Information Technology Including Electrical Business Equipment TUV EN60950 Information Technology Inc...

Page 316: ...Design life statistics provide the point at which statistical failure rate begins to rise Head life 10 000 tape motion hours Continuous operation under severe stress envelope with CompacTape media MT...

Page 317: ...a Specifications Table A 30 lists the media characteristics Table A 30 CompacTape Recording Media Specifications CompacTape III Description Quantity Width 0 5 in metal particle Length 1200 ft Cartridg...

Page 318: ...______ Note _____________________________ This byte has two formats a byte code and a bit flags format The bit flags format is used when there is no internal status code to report and can be distingui...

Page 319: ...20 14 Block to append to not found 21 15 Data synchronization error read after write not happening 22 16 Missing block s in current entity 23 17 Drive hardware write protected 24 18 Reposition target...

Page 320: ...0 Medium changer hardware error 49 31 Medium changer controller error 50 32 Unrecognized medium changer subcommand 51 33 Medium changer fatal error 52 34 Medium changer is in manual mode 53 35 68020 d...

Page 321: ...Definition of Vendor Unique Sense Data Information B 4 DLT2000 DLT2500 DLT2700 Cartridge Tape Subsystem...

Page 322: ...g Overflow 37 00 Rounded Parameter 3B 08 Repositioning error 44 C1 Internal Target failure EEROM copy 1 area bad 44 C2 Internal Target failure EEROM copy 2 area bad 44 C3 Internal Target failure EEROM...

Page 323: ...ock read 14 00 Recorded Entity Not Found 15 02 Position error detected by read of medium 30 00 Can t Read Medium 3B 00 Sequential positioning error 3B 08 Repositioning error 51 00 Erase Failure 80 00...

Page 324: ...ransfer timeout 44 86 Insufficient CDB bytes 44 87 Disconnect SDP sequence failed 44 88 Bus DMA transfer timeout 48 00 IDE Message received 47 00 SCSI Parity Error 51 00 Erase Failure 53 00 Media Load...

Page 325: ...D Media Destination Element Full 3B 0E Media Source Element Empty 3D 00 Invalid Bits in ID Message 53 02 Media Removal Prevented 82 00 Not allowed if not at BOT Unit Attention 6 28 00 Not Ready To Rea...

Page 326: ..._______________ The Filemark EOM ILI bits may be set even though ASC ASCQ 00 00 ___________________________________________________________ 1 FM EOM ILI bit may be set with no sense key 0 and ASC ASCQ...

Page 327: ...Sense Key Information C 6 DLT2000 DLT2500 DLT2700 Cartridge Tape Subsystem...

Page 328: ...orm to the standard EEROM LOG packet envelope as shown in Figure D 1 The information logs are maintained as a circular buffer a new entry will overwrite the oldest existing entry At any point in time...

Page 329: ...oftware detected fatal failure For example a hardware failure or an internal system consistancy failure might cause a bugcheck These events cause Bugcheck packets to be written into EEROM Refer to Fig...

Page 330: ...gcheck Meaning and Possible Cause Code E204 nexpected Timer2 Interrupt possible ECM fault EE01 Spurious Non Maskable Interrupt possible ECM fault EE02 Spurious 8254 Timer Interrupt possible ECM fault...

Page 331: ...in Figure D 3 Bits 7 0 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 96 POH PC Time Stamp reserved POST Last Fail Vector Secondary POST Vector Tertiary POST Vector Figure D 3 POST LOG Packet Lay...

Page 332: ...og byte last event log byte Figure D 4 EVENT LOG Packet Layout Table D 3 Event Log Codes Event Log Code Meaning 0xA400 Hard Read Error Log 0xA401 Hard Write Error Log 0xA402 Drive Error Log 0xA403 Loa...

Page 333: ...ent Logs Saved Overwrites ReReads ReWrites These are fields are used as temporaries and have no use in interpreting these packets Dir Called Mode A code which specifies the original reason for the dir...

Page 334: ...y Event Statuses Primary Secondary Meaning 0 0 Status Unknown 1 1 No Directory 50 70 Format 1 10 Inconsistent Formats 1 11 Wrong Format 1 12 Reserved Field Validation Failed 1 20 Read Sync Time Out 1...

Page 335: ...et The CUP status packet is written after every code update attempt regardless of its status Refer to Figure D 6 for the overall packet layout The Old 68020 and Old Servo Sections contain informa tion...

Page 336: ...Update Status reserved New 68020 Code SubRev reserved Servo Fw Update Status reserved New 68020 Rel Flag reserved Old 68020 Code Version reserved New 68020 Code EDC value Old 68020 Code Sub revision N...

Page 337: ...rase of FLASH Memory Failed 55 FLASH Memory Clear zero Failed 56 Invalid Image Compressed Table D 7 Servo Code Update Status Status Meaning 0 No Update Operation Performed 1 Code Update Operation Succ...

Page 338: ...4 5 18 using a 3 22 using cleaning tape cartridge 3 23 write protect switch 5 20 Cartridge insert release handle when to operate 3 11 Cartridge before loading 4 21 Cartridge insert 4 23 Cartridge load...

Page 339: ...00 Drive error description 6 5 DLT2500 Error conditions 6 5 DLT2500 Errors clearing for loader drive controller or unknown 6 6 DLT2500 Errors clearing for magazine 6 5 DLT2500 Loader error description...

Page 340: ...Guidelines DLT2700 configuration 5 3 for configuration 2 4 for installation 2 2 H Header and data mode 8 127 High energy transient voltage power cables A 21 Host selection density 4 16 Humidity Enviro...

Page 341: ...l tape tension performance specifications A 11 Nonoperating Shock A 16 Nonoperating Vibration A 16 Normal mode 4 17 O OCP 4 9 OCP Disabled mode 5 5 OCP Disabled 4 13 OCP enabled 4 13 OCP locked 4 13 O...

Page 342: ...e 01h 8 61 8 86 Storage Element Status Page 8 136 Supported Pages Log Page Page 0 8 37 Transport Geometry Parameters Page 1Eh 8 142 Vital Product Data Pages 8 22 Page format 8 37 Parity checking disab...

Page 343: ...quirements A 16 Side view A 10 Slot Select button 5 17 operation 5 17 SPACE 8 120 STATUS phase 8 5 Storage element status page 8 136 Storage ranges environmental specifications A 14 Subsystem installa...

Page 344: ...tal product data pages 8 22 W WRITE 8 124 WRITE BUFFER 8 126 Write data 8 127 WRITE FILEMARKS 8 129 Write protect switch 3 17 4 20 4 21 5 20 diagram 3 18 4 20 positioning 3 17 write enabling 3 19 writ...

Page 345: ...Index 8 DLT2000 DLT2500 DLT2700 Cartridge Tape Subsystem...

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