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Chapter 5

ATAPI Interface

Page 52

STT8000A Product Manual

Read command

Bit

Byte

7

6

5

4

3

2

1

0

0

Operation code (08h)

1

Reserved

1 (Fixed)

2

(MSB)

3

Transfer Length

4

(LSB)

5

Reserved

The Transfer Length specifies the number of fixed 512 byte blocks to be transferred.
A transfer length of 0 indicates that no data is to be transferred but will initiate a
read-ahead.

The DSC bit is reset (0) after this command is accepted and is set (1) when at least
52 blocks in the buffer are available for the next READ command. Issuing a READ
command when the DSC bit is reset (0) will keep the ATA bus busy (BSY = 1) while
the drive is reading the required data into the buffer. This delay could be more than
a minute if exhaustive retries are required to read the data.

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Содержание STT8000A

Страница 1: ...STT8000A ATAPI Minicartridge Drive Product Manual...

Страница 2: ...e trademarks or registered trademarks of their owners Seagate reserves the right to change without notice product offerings or specifications Seagate Technology provides this manual as is without warr...

Страница 3: ...different outlet so that the computer and receiver are on different branch circuits If necessary you should consult the dealer or an experienced radio television technician for additional suggestions...

Страница 4: ...right is conveyed to reproduce or translate any item herein disclosed without express written permission from Seagate Technology Seagate Technology provides this manual as is without warranty of any...

Страница 5: ...specifications 9 Performance specifications 10 Environmental requirements 11 Reliability 12 Mean Time Between Failures 12 Mean Time To Repair 12 Recommended tapes 13 Tape capacities and formats 13 Re...

Страница 6: ...ace 31 ATA 2 Signals 31 DASP 31 PDIAG 31 ATA registers 32 Status Register 32 Error Register 33 Feature Register 33 Supported ATA Commands 34 Execute Drive Diags 90h 34 Idle Immediate E1h 34 Standby Im...

Страница 7: ...d 59 Write command 60 Write Filemark command 61 Write Buffer download microcode command 62 Tape format 63 Introduction 63 Tape partitioning 63 Track positions 63 Track numbering 64 Track format 64 Fra...

Страница 8: ...Table of Contents Page viii STT8000A Product Manual Glossary 73 Acronyms and measurements 77 Acronyms and abbreviations 77 Units of measurement 79...

Страница 9: ...t through the Seagate feature FastSenseTM This feature enables the drive to automatically sense the fastest supportable data transfer rate of the host system and choose a transfer speed of either 600...

Страница 10: ...h of small networks the need for cost effective high capacity storage has grown The STT8000A is ideal for high end standalone computers workstations and small networks Built using long wearing materia...

Страница 11: ...dia 2 Gbytes on 400 foot QIC Wide media and 1 6 Gbytes on 400 foot quarter inch minicartridge media Typical compressed capacities of 8 Gbytes on 740 foot TR 4 media 4 Gbytes on 400 foot QIC Wide media...

Страница 12: ...some 60 Mbytes on 9 tracks QIC 24 1982 to the to the 8 Gbyte capacity achievable with the STT8000 minicartridge drive on a single Travan TR 4 cartridge The streaming tape intelligence in the STT8000A...

Страница 13: ...ture enables qualified OEMs needing to revise the drive firmware to do so rapidly and at a reduced cost Flash EEPROM should also prolong the life cycle of a drive because many new techniques such as i...

Страница 14: ...king tips inspection information installation connection instructions mounting dimensions and connector pinouts 4 Drive operation and maintenance Explains the operation of the drive and provides maint...

Страница 15: ...ommended tapes Tape capacities and formats Regulatory compliance Physical specifications The physical specifications of the STT8000A are listed in the following table Specification Drive for 3 5 Inch...

Страница 16: ...8000A 3 5 Inch mount general dimensions 4 00 in 101 6 mm 6 19 in 157 2 mm 0 157 in 4 mm 4 00 in 101 6 mm 1 00 in 25 4 mm Figure 2 2 STT8000A 5 25 Inch mount general dimensions 1 685 42 8mm 5 87 149 0m...

Страница 17: ...values Specification Measurement DC Voltage 12 VDC 5 VDC Voltage Tolerance 10 5 Operational Current 2 0 amps 1 0 amp Standby Current 0 2 amp 0 6 amp Peak 2 2 amps max Power Sequence None None Ripple p...

Страница 18: ...ive 45 Mbytes min typ compressed Data transfer rate 300 450 600 Kbytes per second FastSense Tape speed Read Write Search Rewind 33 51 77 ips 90 ips maximum Recording method Serpentine Recording format...

Страница 19: ...idity 20 to 80 non condensing1 5 to 95 non condensing2 Maximum wet bulb temperature 78 8 F 26 C No condensation Altitude 1000 to 15 000 feet 1000 to 50 000 feet Vibration Peak to Peak Displacement 0 0...

Страница 20: ...iods Operational time is assumed to be 20 of the power on time Operational time is the time the tape is loaded Note Seagate does not warrant the stated MTBF as representative of any particular unit in...

Страница 21: ...capacity with data compression miniMAGNUSTM 3080 QIC Wide 900 Oe 400 ft QIC 3080 2 GB capacity 4 GB capacity with data compression 4000QT QW 3080XLF Tape capacities and formats The following table gi...

Страница 22: ...ment where the combination has been determined to be suitable by an appropriate certification organization for example Underwriters Laboratories Inc or the Canadian Standards Association in North Amer...

Страница 23: ...form the installation at a static safe workstation If one is not available follow these guidelines as you install the drive unit Work in an uncarpeted area To protect the drive from static electricity...

Страница 24: ...after the drive has been installed The default setting is Slave mode with a jumper over pin 3 and pin 4 Your system setting may vary so be sure to check your computer or ATAPI controller manual to det...

Страница 25: ...r removed remove the face plate from the drive bay in which you plan to install the drive Refer to the manual that you received with your computer for instructions about removing the face plate if nec...

Страница 26: ...of the connector aligns with pin 1 on the cable connector See Figure 3 1 for the location of the connector and the Pin 1 location Note Pin 1 on the connector on the rear of the drive is to your right...

Страница 27: ...70 mm 1 220 in 31 mm 0 315 in 8 mm 0 2 in 5 mm 0 157 in 4 mm 1 0 in 25 4 mm 4 0 in 102 6 mm 3 7 in 94 mm Figure 3 5 Mounting holes on internal drive with mounting brackets 5 49 in 139mm 3 12 in 79mm 2...

Страница 28: ...us bit 66 Host Device 6 DD9 Data Bus bit 9 Host Device 7 DD5 Data Bus bit 6 Host Device 8 DD10 Data Bus bit 10 Host Device 9 DD4 Data Bus bit 4 Host Device 10 DD11 Data Bus bit 11 Host Device 11 DD3 D...

Страница 29: ...able Select Device 29 DMACK DMA Acknowledge Host 30 GND Ground N A 31 INTRQ Interrupt Request Device 32 10CS16 16 Bit I O Device 33 DA1 Device Address Bit 1 Host 34 PDIAG Passed Diagnostics Device 35...

Страница 30: ...Chapter 3 Installation Page 22 STT8000A Product Manual Notes...

Страница 31: ...ont panel LED Using cartridges Loading revised firmware updating flash EEPROM Drive maintenance and troubleshooting instructions Front panel LED The front panel of the Travan drive see Figure 4 1 cont...

Страница 32: ...d it is held firmly in place by the drive s positive locking mechanism Caution DO NOT remove a tape cartridge while the drive is active Complete any tape operations and wait until the amber LED is OFF...

Страница 33: ...ou want to make sure that important data on the tape will not be overwritten Figure 4 4 shows the cartridge with the switch in the non protected read write or unlocked position Figure 4 4 Travan cartr...

Страница 34: ...steady rate as the firmware upgrade continues Approximately 45 seconds later the drive resets internally and the tape moves back and forth then stops 5 The LED light will go off and remain off Double...

Страница 35: ...n equipment mechanical or printing calculators motors and bulk erasers Do not lay cartridges on the computer monitor or on the base unit of the computer Keep the cartridge away from direct sunlight an...

Страница 36: ...he Seagate approved 3M DC2000 cleaning cartridge DC051111 12947 P N CKDC2000 which is available through Seagate Express 1 800 531 0968 or you can manually clean the drive head To manually clean the dr...

Страница 37: ...rtridge and try again Make sure you are using the correct type of tape cartridge 2 Turn off all power to the computer and drive Wait for the computer to power down and then start over 3 Try a differen...

Страница 38: ...Chapter 4 Drive operation and maintenance Page 30 STT8000A Product Manual Notes...

Страница 39: ...ional in the QIC 157 specification ATA 2 Interface The information about the ATA 2 interface is presented in the following topics ATA 2 Signals ATA Registers and ATA Commands ATA 2 Signals Only the DA...

Страница 40: ...EBh Drive Head 00 00 00 During an ATA soft reset or aborted ATA command the host view of the DSC bit Status register will be cleared along with the DRDY bit Any ATAPI command including ATAPI Identify...

Страница 41: ...erable data might be left in the buffer 0 ILI Illegal Length Indication This bit is set when an illegal length block is read Sense Status also indicates ILI Feature Register The following layout repre...

Страница 42: ...generate an interrupt Although the drive has no actual power saving features this command is emulated for software compatibility Standby Immediate E0h This command causes the device to set its Power...

Страница 43: ...ode Feature If the Set Transfer Mode feature 03h is received the Sector Count ATAPI Interrupt Reason register is used to set the transfer mode based on the following table Any transfer modes not liste...

Страница 44: ...and other parameters in the host ATA IDE interface The following table defines the values returned by the drive Word Description Value Meaning 0 General Configuration 81C0h ATAPI Streaming Tape Remov...

Страница 45: ...ulti Word DMA Cycle Time 0078h Mode 2 120 nanoseconds 67 Minimum PIO Cycle Time w o IORDY 0078h Mode 4 120 nanoseconds 68 Minimum PIO Cycle Time with IORDY 0078h Mode 4 120 nanoseconds 69 255 Reserved...

Страница 46: ...some other drives 01h Y REWIND 03h N REQUEST SENSE Null status if DSC not set 08h buffer READ Delay occurs if first READ is not READ 0 blocks 0Ah buffer WRITE Write 0 not required to initialize DSC 10...

Страница 47: ...OD pattern The Use Count field of the Control Frame is incremented from its previous value This action results in a logical erasure of the current partition If partition 0 is erased partition 1 become...

Страница 48: ...ed values Note Much of the information returned by this command is redundant with the ATAPI Identify Device command response Byte Description Value Meaning 0 Peripheral Device Type 01h Streaming Tape...

Страница 49: ...nd includes implicit rewind and select partition 0 operations The DSC bit is reset 0 after this command is accepted and is set 1 when the drive has initialized and is ready REQUEST SENSE can then be u...

Страница 50: ...o the specified partition then attempts to locate before the specified logical block All addresses are interpreted as logical A locate to Block 0 in any partition is treated like a rewind to BOP and d...

Страница 51: ...Parameter List Length 8 LSB 9 Reserved The PC Page Control field is 01 for current values The Parameter List Length field specifies the number of data bytes to transfer If the PCR bit is 1 and the Pa...

Страница 52: ...of data is being requested The Parameter Pointer field allows requested parameter data to begin from a specific parameter code The Allocation Length field specifies the number of data bytes to transfe...

Страница 53: ...20 21 Parameter Code 8020h Even Tracks ECC Corrections Code 22 Parameter Bits 40h Device Controlled Counter 23 Parameter Length 04h 4 byte Counter 24 27 Even Tracks reverse ECC Corrections N N N N Co...

Страница 54: ...ining Capacity Partition 1 Value N N N N 20 23 Parameter Code Bits Length 0003h 40h 04h Maximum Capacity Part 0 Code 24 27 Maximum Capacity Partition 0 Value N N N N 28 31 Parameter Code Bits Length 0...

Страница 55: ...nsferred to the device as data A Parameter List Length of zero indicates that no data is transferred Mode Sense should be issued prior to Mode Select to determine the supported pages page lengths and...

Страница 56: ...y current values are reported If DBD Disable Block Descriptor is set 1 then the Mode Block Descriptor is not included in the data returned to the host The Allocation Length field specifies the number...

Страница 57: ...le defines the tape speeds supported with QIC 3095 tapes Speed Tape Speed Transfer Rate 0000b Automatic Automatic 0001b 46 ips 489 Kbytes sec 0010b 69 ips 733 Kbytes sec 0011b 92 ips 1 000 Kbytes sec...

Страница 58: ...lities and Mechanical Status Pages Byte Description Value Meaning 0 Page Code 2Ah Capabilities and Mechanical Status Page 1 Page Length 12h 18 Bytes of Information 2 3 Reserved 00h 00h 4 SPREV bit 5 R...

Страница 59: ...ment 32 6 7 SEGTRK NNNN Number of Segments per Track 8 9 TRKS NN Number of Tracks per Tape 10 MAXSECT 80h Max MFM Sector Value 128 11 MAXCYL NN Max MFM Cylinder Value 12 MAXHD NN Max MFM Head Value 13...

Страница 60: ...r length of 0 indicates that no data is to be transferred but will initiate a read ahead The DSC bit is reset 0 after this command is accepted and is set 1 when at least 52 blocks in the buffer are av...

Страница 61: ...te Description Value Meaning 0 BOP EOP BPU nn 80h Beginning of Partition 40h End of Partition 04h Block Position Unknown 1 Partition Number 00 01h Current Partition bit 0 2 3 Reserved 00h 4 8 First Bl...

Страница 62: ...gical block position The First and Last Block Locations both return the same host location and Blocks and Bytes in Buffer are reported as 0 Because Read Position is DSC restrictive on all ATAPI tape d...

Страница 63: ...or CHK error is set 1 If DSC and CHK are both reset 0 a non error null status is returned Normally if CHK is set DSC is set The only time CHK is set and DSC is reset is during writes at logical end of...

Страница 64: ...M ILI Sense Key NN 80h Filemark 40h EOM 20h ILI Sense Key 3 6 Information NNNNNNNN Transfer Residue or Unwritten Blocks Filemarks 7 Additional Sense Length 0Ah 10 bytes following 8 11 Command Specific...

Страница 65: ...The Rewind command first ensures that all buffered write data has been transferred to the medium then causes the device to position to BOP of the current partition The DSC bit is reset 0 after this co...

Страница 66: ...e only Space codes that are supported are 001b Filemarks and 011b End of Data on Current Partition For Space Filemarks negative count 2s compliment indicates Space Filemarks Reverse The DSC bit is res...

Страница 67: ...d It s purpose is to indicate the cartridge state no cartridge or drive fault cartridge becoming ready or cartridge drive ready If the drive is busy with a previous command DSC reset the drive will wa...

Страница 68: ...blocks to be transferred A transfer length of 0 indicates that no data is to be transferred but is used on some drives to put DSC into write buffer mode The DSC bit is reset 0 after this command is ac...

Страница 69: ...DSC 0 and returns completion status Any data remaining in the buffer is then written to tape flush synchronize and if the count is 1 a Filemark is written In any case an EOD is then written The Immed...

Страница 70: ...B 7 Transfer Length 8 LSB 9 Reserved The Write Buffer command is intended only to provide a method for downloading new drive microcode firmware into Flash EPROM so the only valid MODE is 101 download...

Страница 71: ...GB on the data partition of one 900 foot long 0 315 inch 8 0 mm wide Travan TR 4 tape Using software data compression these capabilities are typically doubled The recording format and partitioning su...

Страница 72: ...gical numbering does not relate to the blocks physically recorded on the tape rather this type of numbering is the block numbering system used by the host computer Often the host system operates with...

Страница 73: ...ewritten in its entirety at the beginning of the following track Frames are not split around corner turns The general frame layout 52 data blocks and 12 ECC blocks is illustrated in Figure 6 2 Figure...

Страница 74: ...n blocks Filemark blocks Setmark blocks and Cancelmark blocks contain specific types of information Filemark blocks are physical blocks written to tape in response to a host WRITE FILEMARKS command Se...

Страница 75: ...improvement in read back resolution On 900 Oersted media write equalization provides the benefit of compatibility with Magneto Resistive MR heads MR heads are prone to saturation by low frequency flu...

Страница 76: ...Chapter 6 Tape format Page 68 STT8000A Product Manual Notes...

Страница 77: ...tail and explains implementation specific information Block diagram The electronics of the STT8000 ATAPI minicartridge drive are laid out on one main printed circuit board PCB Figure 7 1 shows a simpl...

Страница 78: ...e aperture A switch is actuated at this point that causes a microprocessor to complete the loading operation When the tape is in motion the amber LED on the front panel flashes The LED is not lit when...

Страница 79: ...nt from the control logic to control the stepping of the head from track to track and to move the tape forward and back across the tape head Head design The recording playback head is a state of the a...

Страница 80: ...minicartridges The drive is designed to use Travan TR 4 cartridges QIC 3080 quarter inch minicartridges and QIC 3080 QIC Wide minicartridges These small approximately 2 inches x 3 inches x 0 4 inch c...

Страница 81: ...BOT marker is a set of two holes punched side by side in the tape Byte A group of 8 binary bits operated on as a unit Cancelmark A negative Filemark or Setmark When a Cancelmark follows as the first b...

Страница 82: ...EW The early warning marker is a single hole punched in the tape to indicate the approaching end of the usable recording area in the forward direction File A logical unit of information Filler block...

Страница 83: ...the cartridge Streaming A method of recording on magnetic tape that maintains continuous tape motion without the requirement to start and stop within an inter block gap Tape Drive A peripheral storag...

Страница 84: ...Appendix A Glossary Page 76 STT8000A Product Manual Notes...

Страница 85: ...ch CD Compact Disc CMOS Complementary Metal Oxide Semiconductor CSA Canadian Standard Association DMA Direct Memory Access ECC Error Correction Code ECMA European Computer Manufacturers Association EE...

Страница 86: ...n Failures MTTR Mean Time To Repair OEM Original Equipment Manufacturer PCB Printed Circuit Board QIC Quarter Inch Cartridge Drive Standards Incorporated RAM Random Access Memory RLL Run Length Limite...

Страница 87: ...ted sound power reference one picowatt F Fahrenheit ft foot or feet g acceleration of a free falling body equal to 32 17 feet per second2 Gbyte gigabyte Hz Hertz in inch k kilo Kbyte kilobyte kg kilog...

Страница 88: ...Appendix B Acronyms and Measurements Page 80 STT8000A Product Manual...

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