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CHAPTER 6: SCSI Description

Important features of SCSI-2 implementation include the following:

•

Efficient peer-to-peer I/O bus with up to 15 devices

•

Asynchr onous transfer rates that d epend only on d evice implementation and
c able length

•

Logica l addr essing for all da ta blocks (rather than physical addr essing)

•

Multiple initiators and multiple targets

•

Distributed arbitration (bus c ontention logic)

•

Command set enhancement.

For more   details about specif ic SCSI c ommands or messages, refer to a separate
document,: Super DLT SCSI InterfaceGuide. P/N 432614, rev 01 or later.

Содержание SDLT220-320 INTEGRATION

Страница 1: ...TANDBERG Super DLTTM Product manual Revision 2 June 2002 432589 01...

Страница 2: ...ive works The possessor agrees to safeguard this information and to maintain it in confidence and not re publish it in whole or in part without Tandberg s prior written consent Tandberg Data reserves...

Страница 3: ...SDLT 220 and SDLT 320 Product Manual Revision History Revision Date YYMMDD Summary of Changes 422216 01 020610 Initial Release...

Страница 4: ...ta cables or the need for special devices such as ferrite beads on cables is required if such means of interference suppression was used in the qualification test for the device This information will...

Страница 5: ...nd used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this e...

Страница 6: ...ce to device and needs to be obtained from the EMC Electromagnetic Compatibility group or product manager This Class B digital apparatus complies with Canadian ICES 003 Cet appareil num rique de la cl...

Страница 7: ...eatures 2 2 SDLT 220 320 Technology 2 3 Laser Guided Magnetic Recording 2 3 Pivoting Optical Servo 2 4 Magneto Resistive Cluster Heads 2 4 Advanced Partial Response Maximum Likelihood 2 5 Advanced Met...

Страница 8: ...Current and Power Requirements 3 10 Tape System Recording Method 3 12 Environmental Specifications 3 13 Air Flow Requirements 3 13 Temperature and Humidity 3 14 Storage and Shipment 3 14 Altitude 3 1...

Страница 9: ...g the Firmware 5 4 Update the Firmware Using the SCSI Bus 5 4 Making a FUP CUP Tape 5 5 Using a CUP FUP Tape 5 5 Troubleshooting the Firmware Code Update 5 6 Cleaning the Tape Mechanism 5 7 Occasional...

Страница 10: ...ptibility and ESD Limits 7 5 Acoustic Noise Emissions 7 6 APPENDIX A SDLT I Tape Cartridge A 1 Tape Cartridge Handling Guidelines A 2 Tape Cartridge Inspection Procedure A 3 Tape Cartridge Write Prote...

Страница 11: ...able 3 6 SDLT 220 320 Performance Data 3 7 Table 3 7 Non Operating Shock Specifications Unpackaged 3 8 Table 3 8 Non Operating Shock Specifications Packaged Drop 3 8 Table 3 9 Non Operating Vibration...

Страница 12: ...D Control Functionality 5 12 Table 5 4 Troubleshooting Chart 5 13 CHAPTER 6 SCSI Description 6 1 Table 6 1 Implemented ANSI SCSI 2 Commands 6 3 Table 6 2 Implemented ANSI SCSI 3 Commands 6 5 Table 6 3...

Страница 13: ...rs on the Back Panel 4 8 Figure 4 2 Back Panel Connector Locations Drawn to Scale 4 8 Figure 4 3 TERMPWR Connector 4 10 Figure 4 4 SDLT 220 320 Two Views Front Side Top and Back Side Top 4 11 Figure 4...

Страница 14: ...Switch on Tape Cartridge A 5 Figure A 4 Front Panel LEDs A 7 APPENDIX B DLT IV Tape Cartridge B 1 Figure B 1 End View of DLT Cartridge B 4 Figure B 2 Bottom View of DLT Cartridge B 4 Figure B 3 DLT Ta...

Страница 15: ...asy to use comprehensive information source and product catalog to familiarize both the Tandberg Data customer base and systems professional with the SDLT 220 and SDLT 320 cartridge tape systems subse...

Страница 16: ...er 3 Drive Specifications lists various specifications for the tape system product functional environmental and recording media Chapter 4 Installing Your Tape Drive contains handling and pre installat...

Страница 17: ...ncluding handling and inspection procedures information on the write protect switch and how to load and unload a tape cartridge Appendix B DLT IV Cartridge includes the cartridge insertion and ejectio...

Страница 18: ...ed information visit http www tandberg com Table 1 1 Typographical Conventions Element Convention Example Commands Uppercase unless case sensitive FORMAT UNIT Messages Uppercase INVALID PRODUCT NUMBER...

Страница 19: ...r Comments Tandberg Data is committed to providing the best products and service We encourage your comments suggestions and corrections for this manual Please send all comments to Tandberg Data ASA P...

Страница 20: ...CHAPTER 1 Introduction...

Страница 21: ...in the SDLT 220 and 320 products Tandberg Diagnostics Tools describes tools and utilities that provide the ability to run diagnostics and test for drive functionality TapeAlert describes a built in ta...

Страница 22: ...tem and tape library solutions The SDLT architecture builds on the DLT legacy by offering backward compatibility data backed up today using the DLT 8000 DLT 7000 DLT 4000 and DLT 1 VS80 systems will b...

Страница 23: ...tically on the backside LGMR optimizes highly proven technologies to deliver the most efficient reliable and scalable data backup solution to the mid range market 2 3 1 Laser Guided Magnetic Recording...

Страница 24: ...ad to track dynamic variations in tape motion which provides a track count with an order of magnitude increase over current DLT products 2 3 3 Magneto Resistive Cluster Heads Magneto Resistive Cluster...

Страница 25: ...e back side of the media the entire data bearing side of the media is available for recording data and eliminate the need for pre formatting In addition AMP media has been designed to meet the needs o...

Страница 26: ...Module FPM Electronic Interface Module EIM SDLT Cartridge Tape Module CTM The modular concept makes the SDLT system easy to manufacture and configure Each module is optimized to perform a specific set...

Страница 27: ...OS and MRC heads described in Section 2 3 2 Pivoting Optical Servo on page 2 4 and Section 2 3 3 Magneto Resistive Cluster Heads on page 2 4 the DCM contains a number of components that interact to pe...

Страница 28: ...ured and tested as a stand alone module simplifying the design manufacturing and troubleshooting processes Base Plate The SDLT base plate is an aluminum die casting with precisely machined surfaces th...

Страница 29: ...dge load and disengaging them on cartridge unload The SDLT buckling mechanism has been designed to work with the new leaders of the SDLT design as well as the leaders of the previous DLT design allowi...

Страница 30: ...inct module 2 4 5 SDLT Cartridge Tape Module As with all tape technologies the SDLT cartridge is a key part of the overall system The main function of the Cartridge Tape Module CTM is to provide the m...

Страница 31: ...LT Tape 1 DLT Tape IV Read Only DLT 1 VS80 TRS13 Model Read Only SDLT Tape 1 DLT Tape IV Read Only DLT 1 VS80 Read Only The compression rates shown assume an industry standard 2 1 compression ratio Ac...

Страница 32: ...ows you to load tape drive firmware and create code upload tapes GSLink Allows you to quickly diagnose the integrity of the drive using an infrared wireless communication connector located on the fron...

Страница 33: ...pplication will automatically read the device s TapeAlert SCSI log page to check for any problems If an error is flagged your backup software displays a clear warning message on your screen and adds t...

Страница 34: ...CHAPTER 2 SDLT 220 320 Product Information...

Страница 35: ...nctional Specifications provides the functional specifications for the SDLT 220 320 tape drives Environmental Specifications provides the environmental specifications for the SDLT 220 320 tape drives...

Страница 36: ...page 4 10 3 1 2 Physical Dimensions Table 3 1 provides physical dimensions for the SDLT system Table 3 1 SDLT 220 320 Physical Dimensions and Shipping Weight Description Internal Version Tabletop Vers...

Страница 37: ...compression ratios achieved depend on the redundancy and type of data files being written 3 1 4 Compression The drive contains on board hardware to compress and decompress data using a DLZ algorithm...

Страница 38: ...tegrity for the overall tape system is shown in Table 3 3 Table 3 3 Data Transfer Error Rates Error Type Frequency Error Rates Recoverable READ 1 error in 106 bytes read Detected Unrecoverable READ 1...

Страница 39: ...DLT 320 Burst Max Configu ration Native Com pressed Native Com pressed HVD Ultra 1 SCSI Narrow 11 MB sec 20 MB sec 20 MB sec 16 MB sec 20 MB sec 20 MB sec Wide 11 MB sec 22 MB sec 40 MB sec 16 MB sec...

Страница 40: ...al figures vary from unit to unit 3 1 8 Load and Unload Cycles Load and unload cycles are rated at 15 000 for the cartridge itself Table 3 5 shows the number of load and unload cycles and tape inserti...

Страница 41: ...ty 133 Kbits per inch bpi 193 Kbits per inch bpi Read Write Tape Speed 116 inches per second ips 122 inches per second ips Rewind Tape Speed 160 ips Same Linear Search Tape Speed 160 ips Same Average...

Страница 42: ...npackaged Shock Unpackaged Pulse Shape Square wave sine pulse Peak Acceleration 40 G 140 G Duration 10 ms 180 inches second 2 ms Application X Y Z axes twice in each axis once in each direction Table...

Страница 43: ...08 G2 Hz Application X Y Z axes Sweep rate 60 minutes axis Vibration Packaged Type Random Frequency Range Truck Profile 0 5 Grms Air Profile 1 0 Grms Application X Y Z axes 30 minutes each profile and...

Страница 44: ...two modes is similar enough that they are listed together Power up current surges are less than those encountered during motor accelerations and so are not listed separately NOTE In Table 3 11 the cu...

Страница 45: ...ing this operating mode These values are calculated from the average of RMS current 3 sigma measured at nominal DC voltage 3 The typical current is calculated from the average of all RMS current drawn...

Страница 46: ...ecording Method The SDLT 220 tape system uses the Partial Response Maximum Likelihood PRML 32 33 encoding method for reading writing SDLT format The SDLT 320 tape system uses the PRML 32 33 encoding m...

Страница 47: ...drives be used in a clean smoke free environment 3 3 1 Air Flow Requirements Adequate air flow must be provided for the internal tape drive to dissipate the heat resulting from continuous drive operat...

Страница 48: ...mperature 25 C 77 F 25 C 77 F Dry Bulb Temperature Range 10 C to 40 C 50 F to 104 F 10 C to 40 C 50 F to 104 F Temperature Gradient 11 C 20 F hour across range 15 C 27 F hour across range Relative Hum...

Страница 49: ...ment for the tape drive may not exceed the particulate counts shown in Table 3 14 3 4 Recording Media Specifications The following tables provide specifications for SDLT I media Basic media specificat...

Страница 50: ...ice computer environment Cartridge Housing Color Dark Green Table 3 16 DLTtape Media Operating and Storage Limits Operating Conditions Temperature 10 to 40 C 50 to 104 F Relative Humidity 20 to 80 non...

Страница 51: ...ed in Table 3 17 Table 3 17 Backward Read Compatibility BRC Transfer Rates Format Cartridge Type Native Capacity GB Native Read Transfer Rate MB second SDLT 320 SDLT I 160 16 0 SDLT 220 SDLT I 110 11...

Страница 52: ...CHAPTER 3 Drive Specifications...

Страница 53: ...idelines when working with the tape system Pre Installation Guidelines describes proper steps to take before the drive is installed in a system This includes recording the model and serial numbers che...

Страница 54: ...es described here and in other sections of the manual 1 Remove power from the system before installing or removing the tape drive to prevent the possibility of electrical shock or damage to the tape d...

Страница 55: ...e Never place the tape drive so that it rests on its front bezel Always gently place the drive flat printed circuit board PCB side down on an appropriate ESD protected work surface to avoid the drive...

Страница 56: ...problems Use a properly installed anti static pad on your work surface Always use a properly fitted and grounded wrist strap or other suitable ESD protection when handling the tape system and observe...

Страница 57: ...will be very helpful if you have to contact technical support These numbers can be found on the bottom of the drive enclosure 3 Check the SCSI cable to ensure it is compatible with the SCSI controlle...

Страница 58: ...cludes the following Setting the SCSI ID for the drive default SCSI ID 5 Configuring the drive to provide TERMPWR Setting the configuration jumper default wide SCSI enabled If you want to change any o...

Страница 59: ...pin SCSI ID block located on the back of the drive Figure 4 1 on page 4 8 or In a library setting you can set the IDs through firmware The firmware default is SCSI ID 5 and no jumpers are installed on...

Страница 60: ...Port 8 pin Diagnostic use only Configuration Jumper Omit jumper on Pins 1 2 to enable wide SCSI SCSI ID Jumper Block No jumpers on this block default SCSI ID of 5 TERMPWR Block Install jumper on Pins...

Страница 61: ...0 0 0 1 2 1 0 0 1 0 3 1 0 0 1 1 4 1 0 1 0 0 5 default 0 0 0 0 0 6 1 0 1 1 0 7 1 0 1 1 1 8 1 1 0 0 0 9 1 1 0 0 1 10 1 1 0 1 0 11 1 1 0 1 1 12 1 1 1 0 0 13 1 1 1 0 1 14 1 1 1 1 0 15 1 1 1 1 1 0 No Jumpe...

Страница 62: ...CSI The 8 pin Configuration Jumper block allows you to enable or disable the wide SCSI bus The default setting is for the wide SCSI bus to be enabled there is no jumper across Pins 1 and 2 when wide S...

Страница 63: ...mounting possibilities for tape drives the instructions presented here are general in nature They should be used only as a guide for mounting the drive in your system Mount the drive in the system by...

Страница 64: ...three connectors on the back of the internal SDLT drive that are discussed in this section are 1 SCSI 2 power and 3 optional library loader connectors For the tabletop model typical connectors power c...

Страница 65: ...drive may need to be terminated if the SDLT drive is the only device connected to the SCSI bus OR if the SDLT drive is one of several devices connected to the SCSI bus and it is the last device conne...

Страница 66: ...Pin Assignments Signal Name Pin Number Pin Number Signal Name Ground 1 35 DB 12 Ground 2 36 DB 13 Ground 3 37 DB 14 Ground 4 38 DB 15 Ground 5 39 DB P1 Ground 6 40 DB 0 Ground 7 41 DB 1 Ground 8 42 D...

Страница 67: ...ATN Ground 22 56 Ground Ground 23 57 BSY Ground 24 58 ACK Ground 25 59 RST Ground 26 60 MSG Ground 27 61 SEL Ground 28 62 C D Ground 29 63 REQ Ground 30 64 I O Ground 31 65 DB 8 Ground 32 66 DB 9 Gro...

Страница 68: ...P1 DB 0 6 40 DB 0 DB 1 7 41 DB 1 DB 2 8 42 DB 2 DB 3 9 43 DB 3 DB 4 10 44 DB 4 DB 5 11 45 DB 5 DB 6 12 46 DB 6 DB 7 13 47 DB 7 DB P 14 48 DB P Ground 15 49 Ground DIFFSENS 16 50 Ground TERMPWR 17 51 T...

Страница 69: ...14 3 37 DB 14 DB 15 4 38 DB 15 DB P1 5 39 DB P1 Ground 6 40 Ground DB 0 7 41 DB 0 DB 1 8 42 DB 1 DB 2 9 43 DB 2 DB 3 10 44 DB 3 DB 4 11 45 DB 4 DB 5 12 46 DB 5 DB 6 13 47 DB 6 DB 7 14 48 DB 7 DB P 15...

Страница 70: ...ape Drive MSG 25 59 MSG SEL 26 60 SEL C D 27 61 C D REQ 28 62 REQ I O 29 63 I O Ground 30 64 Ground DB 8 31 65 DB 8 DB 9 32 66 DB 9 DB 10 33 67 DB 10 DB 11 34 68 DB 11 Table 4 4 HVD Mode SCSI Connecto...

Страница 71: ...mber Signal Name 1 12 VDC 2 Ground 12V return 3 Ground 5V return 4 5 VDC Table 4 6 8 Pin Loader Connector Pin Assignments Signal Name Pin Number Pin Number Signal Name Ground 1 5 SEND_TO_LOADER_H REC_...

Страница 72: ...or the tabletop drive This model tape drive is normally configured to meet customer specifications before leaving the factory so should not require any internal configuration changes on site Figure 4...

Страница 73: ...SCSI device then install a SCSI bus cable between the open connector and the next device on the bus 1 Prior to connecting the SDLT drive to the host computer make sure the drive and computer are turne...

Страница 74: ...ld be a minimum of 18 3 AWG 60 C type SJT or SVT UL and CSA certified cordage rated for use at 250 VAC with a current rating that is at least 125 of the current rating of the product The AC plug must...

Страница 75: ...ive connect the other end of the cord to the AC outlet Upon completion proceed to the next section to confirm the installation 4 5 Confirming the Installation To confirm the installation power on the...

Страница 76: ...CHAPTER 4 Installing Your Tape Drive...

Страница 77: ...es how to backup a sample file to ensure proper operation of the system Overwriting 320 Formatted Cartridges in a 220 Drive describes what happens when an SDLT 220 drive is instructed to overwrite the...

Страница 78: ...letely into the system The tape will load automatically Choose a sample file set from the host computer Perform a back up and then restore the file set The system has been correctly installed if the b...

Страница 79: ...cted to overwrite the cartridge with a 220 format NOTE This discussion applies only to SDLT 220 drives firmware revision V45 and higher When a 320 formatted cartridge is overwritten in a 220 drive all...

Страница 80: ...about the suite of diagnostics tools provided by Tandberg Data refer to Tandberg Data s web site www tandberg com Follow the path Support DLT Support 5 4 1 Update the Firmware Using the SCSI Bus SDLT...

Страница 81: ...it 3 Press and hold the Eject button for six seconds after six seconds the Amber Write Protect LED will begin to blink 4 Release the Eject button then quickly press and release the Eject button again...

Страница 82: ...ve is mounted in a tape automation library the tape is not automatically ejected but it is rewound to BOT and unbuckled in preparation for unloading 5 4 4 Troubleshooting the Firmware Code Update Try...

Страница 83: ...necessary 5 5 1 Occasional Cleaning of Tape Head SDLT drives may not require preventative cleaning because of improvements in the head design The frequency of cleaning is dictated to a large degree b...

Страница 84: ...The tape cleaning algorithm is not used for the backward read compatible BRC head this head style does not need cleaning 5 5 3 Life Expectancy of the Cleaning Tape Each SDLT Cleaning Tape is good for...

Страница 85: ...il the drive engages with the cartridge and begins to take up the cleaning media The green Drive Status LED will blink and the cleaning cycle will begin automatically 2 When the cleaning cycle complet...

Страница 86: ...he tape system s activities This section also describes the behavior of the amber colored LED formerly Write Protect on the SDLT 320 drive This LED is now defined as the Density Indicator as shown in...

Страница 87: ...CHAPTER 5 Using Your Tape Drive Figure 5 1 SDLT 220 and SDLT 320 Front Panels A Comparison SDLT 220 SDLT 320...

Страница 88: ...inding the tape the tape is loading unloading or rewinding ON The drive is idle There may or may not be a cartridge in the tape drive OFF There is no Off state Cleaning Required Right Yellow Cleaning...

Страница 89: ...ape system fails its POST If after attempting the recommended actions listed in the table the problem still exists or recurs a hardware failure may be the cause Contact your service representative Tab...

Страница 90: ...umber of devices on the bus including the SCSI adapter to match the limits of the interface being used A device may not have been turned on and a valid SCSI ID may not have been configured prior to th...

Страница 91: ...loaded and ejected from the drive As long as the drive is not mounted in a tape automation library the tape is ejected SCSI status will indicate the drive is in the over temperature condition NOTE If...

Страница 92: ...CHAPTER 5 Using Your Tape Drive...

Страница 93: ...CSI signals and provides bus timing values 6 1 SCSI Overview The Small Computer System Interface SCSI is a specification for a peripheral bus and command set that is an ANSI standard The standard defi...

Страница 94: ...en d only on d evice implementation and c able length Logica l addr essing for all da ta blocks rather than physical addr essing Multiple initiators and multiple targets Distributed arbitration bus c...

Страница 95: ...plete the logical position is before the specified position LOG SELECT 4Ch Optional Provides a means for the initiator to manage statistical information maintained by the drive about the drive This st...

Страница 96: ...al unit SEND DIAGNOSTIC 1Dh Mandatory Requests the drive to perform diagnostic operations on itself SPACE 11h Mandatory Provides a selection of positioning functions both forward and backward that are...

Страница 97: ...ptional Used to register and reserve the drive through resets and power cycles RELEASE 10 57h Mandatory Used to release a previously reserved unit REPORT DENSITY SUPPORT 44h Mandatory Requests the dri...

Страница 98: ...detect errors in transmission across SCSI and trigger a resend of the bad data 6 5 Signal States The following paragraphs describe signal values and SCSI IDs 6 5 1 Signal Values All signal values are...

Страница 99: ...gnal is driven by all SCSI devices that are actively arbitrating SCSI ID Each SCSI device that is actively arbitrating asserts its unique SCSI ID bit The other seven or fifteen data bits are released...

Страница 100: ...to it This SCSI ID provides an address for identifying the device on the bus On the drive the SCSI ID is assigned by configuring jumpers or connecting remote switches to the option connector For deta...

Страница 101: ...ue is true low voltage and 0 when the signal value is false high voltage Data parity DB P is odd Parity is undefined during ARBITRATION DB 15 8 P1 data bus Eight data bit signals plus one parity bit s...

Страница 102: ...s 1 2 s from BSY and SEL first becoming both false If a SCSI device requires more than a bus settle delay to detect BUS FREE it clears the bus within a bus clear delay minus the excess time Bus Free D...

Страница 103: ...election Time 250 ms1 Recommended maximum time after a hard RESET condition until a drive is able to respond with appropriate status and sense data to the TEST UNIT READY INQUIRY and REQUEST SENSE com...

Страница 104: ...CHAPTER 6 SCSI Description...

Страница 105: ...ient electromagnetic fields and describes the susceptibility of the system to unexpected electrostatic discharge Acoustic Noise Emissions describes compliance with various acoustic standards 7 1 Safet...

Страница 106: ...cluding Electrical Business Equipment 7 2 Electromagnetic Field Specifications Tandberg SDLT tape d rives are electricaldev ices as such this equipment generates uses and may emit radio frequency ener...

Страница 107: ...e 7 2 Table 7 1 EMI Regulations and Certifications Type Regulation Certification EEC Directive 89 336 CE BS6527 UK EN55022 EU EN55024 EU CFR 47 1995 FCC Rules Part 15B Class B MDOC IECS 003 Canada V 3...

Страница 108: ...ence field strength in the frequency range from 30 MHz to 1000 MHz at a test distance of 10 meters are listed in Table 7 3 Table 7 3 Radiated Emissions Frequency Range Quasi peak limits dB V m Class A...

Страница 109: ...Cables 1 2 kV Differential 2 5 kV Common mode No errors Low level Conducted Interference for AC and DC Cables 3 V m rms 80 modulated 1 kHz 0 15 80 MHz No errors No screen distortion The SDLT system s...

Страница 110: ...nd pressure Table 7 6 Acoustic Noise Emissions Nominal Acoustics Preliminary declared values per ISO 9296 and ISO 7779 EN27779 Mode Noise Power Emission Level LNPEc Internal Version Tabletop Version I...

Страница 111: ...o a previous generation DLT drive By following general handling procedures conducting careful visual inspections of tape cartridges on a regular ongoing basis and making sure that tape cartridges are...

Страница 112: ...ironment for the tape cartridge is If storage or transportation of a tape cartridge has exposed it to conditions outside the ambient values above you should condition the tape cartridge to its operati...

Страница 113: ...b reel and drive gear from meshing Maintain clean operating working and storage environments Follow all tape cartridge handling instructions that accompany your cartridges or tape drive A 2 Tape Cartr...

Страница 114: ...SDLT I Cartridge Check the reel lock openings and ensure that the small plastic tabs inside are partially visible The reel locks are black in color Like any plastic part the reel locks can break if th...

Страница 115: ...he write protect switch on the front of the cartridge Figure A 3 Figure A 3 Write Protect Switch on Tape Cartridge Move the write protect switch to the left to enable write protection existing data on...

Страница 116: ...Visible Data cannot be written to the tape Existing data on the tape cannot be overwritten Additional data cannot be appended to the media Disabled Not Visible Unless the cartridge is write protected...

Страница 117: ...into the front of the tape drive refer to Figure A 4 as needed 1 Insert the cartridge 2 Push the cartridge fully into the tape drive The Drive Status LED blinks to show that the tape is loading When t...

Страница 118: ...e and the drive is instructed to overwrite the cartridge with a 220 format A scenario like this might be possible in a tape automation library where tapes are being drawn from a large pool usually wit...

Страница 119: ...ve On the other hand REWIND commands will report an error condition if mechanical or servo related problems occur If a READ SPACE or LOCATE command is sent to an SDLT 220 drive containing a 320 cartri...

Страница 120: ...APPENDIX A SDLT I Tape Cartridge...

Страница 121: ...on a regular ongoing basis and making sure that tape cartridges are stored within their environmental limits you will greatly reduce any chance that you will experience problems with your tape cartrid...

Страница 122: ...erating environment for the tape cartridge is If storage or transportation of a tape cartridge has exposed it to conditions outside the ambient values above you should condition the tape cartridge to...

Страница 123: ...b reel and drive gear from meshing Maintain clean operating working and storage environments Follow all tape cartridge handling instructions that accompany your cartridges or tape drive B 2 Tape Cartr...

Страница 124: ...the tape cartridge holding it as shown in Figure B 1 now look at the bottom of the tape cartridge holding it as shown in Figure B 2 Check the reel lock openings and ensure that the small plastic tabs...

Страница 125: ...of the cartridge Using your thumb gently lift up on the tab and swing the door open 8 Inside the door you will see the tape and cartridge leader loop The loop should stick up about an eighth of an in...

Страница 126: ...APPENDIX B DLT IV Tape Cartridge Figure B 4 Tape Cartridges with Damage Visible During Visual Inspection...

Страница 127: ...ridge has a write protect switch Figure B 5 that can be used to prevent accidental erasure of data Since the DLT IV cartridge is a read only cartridge when used in the SDLT drive the write protect swi...

Страница 128: ...rtridge into a Non Backward Read Compatible Non BRC tape drive the drive ejects the cartridge Figure B 6 Front Panel LEDs 2 If you have loaded a DLT IV cartridge into a Backward Read Compatible BRC ta...

Страница 129: ...1 Press the Eject button or issue an appropriate system software command the drive completes any active writing of data to the tape The Drive Status LED blinks as the tape rewinds When the tape is fin...

Страница 130: ...APPENDIX B DLT IV Tape Cartridge...

Страница 131: ...rovides high encoding efficiency recording densities for greater capacity and performance Allocation The process of assigning particular areas of the media to particular data or instructions AMP Media...

Страница 132: ...drive activity LED BIOS Basic Input Output System A set of routines that work closely with the hardware to support the transfer of information between various elements of the system such as memory di...

Страница 133: ...e ejection the cartridge receiver assembly reverses the process and automatically ejects the tape a fixed distance from the front of the drive Compressed Capacity Capacity after data has been processe...

Страница 134: ...for the all tape motion inside the drive and to write data to and read data from the tape Device According to the SCSI specification up to eight SCSI devices can be connected to a single SCSI bus Eac...

Страница 135: ...or EOT End of Media or End of Tape Logical EOM allows space to complete a write operation physical EOM signifies that the tape is completely used Erase The removal of data from a piece of media Error...

Страница 136: ...sed to create and read back the magnetic patterns on the tape Also known as the read write head HiFN An ASIC Application Specific Integrated Circuit for the SDLT that handles data compression HIM Host...

Страница 137: ...e that manages the exchange of data between the drive and computer The most common interfaces for small computer systems are AT IDE and SCSI Jumper A tiny connector box that slips over two pins that p...

Страница 138: ...y The capacity of a given media product in its native recording format without the use of data compression Native Mode Refers to the uncompressed storage capacity of a tape subsystem See Native Capaci...

Страница 139: ...r countries SE Single Ended A term referring to the electrical characteristics of the signal used on the SCSI bus interface For each signal that needs to be sent across the bus there exists a wire to...

Страница 140: ...unit of measure equal to 1000 Gigabytes GB TCM Tape Control Module The SDLT TCM consists of a variety of components the most significant of these include the base plate the cartridge receiver the tape...

Страница 141: ...tion Unformatted Capacity The total number of usable byes on the media including the space that will be required later to record location boundary definitions and timing information See also Native Ca...

Страница 142: ...F 78941 V lizy Cedex France Tel 33 1 39 26 01 01 Fax 33 1 34 65 02 89 sales fr tandberg com Tandberg Data Asia Pte Ltd 801 Lorong 7 Toa Payoh 02 00 Singapore 319319 Tel 65 6259 9330 Fax 65 6258 1702...

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