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Chapter 5

ATAPI Interface

Page 84

Seagate Travan 40 Product Manual

TEST UNIT READY (Group 0, Op Code 00)

This command performs a test to ensure that the tape drive is ready and a tape
cartridge is installed. TEST UNIT READY does not initiate the internal diagnostic
self-test. The drive does not disconnect during execution of this command.

CDB for TEST UNIT READY command

Data Bits

Byte

Hex

Содержание Travan 40

Страница 1: ...STT2401A STT3401A Travan 40 tape drive Product Manual...

Страница 2: ...e Technology LLC Other product names are trademarks or registered trademarks of their owners Seagate reserves the right to change without notice product offerings or specifications No part of this pub...

Страница 3: ...radio television technician for additional suggestions You may find the booklet How to Identify and Resolve Radio TV Interference Problems prepared by the Federal Communications Commission helpful Thi...

Страница 4: ...cifications 7 Current and power requirements 7 Power connector 8 Environmental requirements 8 Reliability 9 Mean Time Between Failures 9 Mean Time To Repair 9 Tape compatibility 10 Regulatory complian...

Страница 5: ...een by OS after boot up 23 Tape won t load 23 Back up program freezes or locks up 23 Bad blocks media errors etc 24 Slow backups 24 Tape won t eject 24 Incompatible format Won t write on this tape 24...

Страница 6: ...76 Sense Code ASC and ASC Qualifier Assignments 77 REWIND Group 0 Op Code 01 80 SEND DIAGNOSTIC Group 0 Code 1D 81 SPACE Group 0 Op Code 11 82 TEST UNIT READY Group 0 Op Code 00 84 VERIFY Group 0 Op...

Страница 7: ...reference servo pattern 117 Write equalization 118 Randomization 118 Theory of operations 119 Overview 119 Block diagram 119 Drive mechanisms 120 Mechanics 120 Cartridge load mechanism 120 Capstan dr...

Страница 8: ......

Страница 9: ...rtridge loading When a cartridge is inserted into the drive it is automatically drawn into the drive mechanism The cartridge is fully loaded within the drive and does not extend beyond the front of th...

Страница 10: ...al drive Figure 2 shows the STT2401A which comes with brackets for mounting in 5 25 inch drive bays Figure 1 STT3401A 3 5 inch internal drive Figure 2 STT2401A 5 25 inch internal drives Typical system...

Страница 11: ...from the minicartridge This streaming motion combined with the serpentine recording method is one element that contributes to the increased storage capacities efficiency and speed of today s minicartr...

Страница 12: ...also prolong the life cycle of a drive because many new techniques such as increasing the capacity of the drive through support for longer tapes may require only a firmware upgrade References The fol...

Страница 13: ...e speed Read Write Fast Forward Rewind 92 inches per second 56 inches per second throttle down speed 110 inches per second Load time 2 seconds mechanical load 18 seconds to READY from Beginning of Tap...

Страница 14: ...5 25 inch mount Height 1 0 in 25 4 mm 1 625 in max 41 3 mm including bezel Width 4 0 in 101 6 mm 5 875 in 149 2 mm including bezel Length 6 4 in max 161 5 mm 6 5 in max 165 1 mm including bezel Weight...

Страница 15: ...Power specifications are measured at the tape drive power connector and are nominal values Current and power requirements Specification Power supply requirement 12V DC supply 5V DC supply Voltage tole...

Страница 16: ...STT2401A and STT3401A All specifications apply to the drive mechanism unless otherwise noted Specification Operational Non operational Temperature Drive Cartridge at baseplate 41 to 104 F 5 to 40 C 41...

Страница 17: ...Repair MTTR Less than 0 5 hour Mean Time Between Failures The Mean Time Between Failures MTBF is greater than 250 000 hours This specification includes all power on and operational time but excludes m...

Страница 18: ...s Length feet Seagate part number Travan 40 40 750 STTM40 Travan NS20 20 740 STTM20 Travan 5 QIC 3220 MC 20 740 STTM20 Note The capacities shown above are based on 2 1 data compression Uncompressed va...

Страница 19: ...not have an electrostatic grounding strap perform 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 are...

Страница 20: ...When the CSEL jumper is off the device address Master or Slave is determined by the setting of the Master jumper When the CSEL jumper is on the Master jumper is ignored and the device address is defin...

Страница 21: ...removed remove the faceplate 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 computer s faceplat...

Страница 22: ...When you make the connection be sure pin 1 of the connector aligns with pin 1 on the cable connector See Figure 6 on page 12 for the location of the connector and the Pin 1 location Note Pin 1 on the...

Страница 23: ...rive operation and maintenance Chapter 4 Seagate Travan 40 Product Manual Page 15 Figure 8 Mounting holes on STT3401A without mounting brackets Figure 9 Mounting holes on STT2401A with mounting bracke...

Страница 24: ...e front panel of the Travan 40 drive contains the cartridge opening and one light emitting diode LED which doubles as an eject button The LED on the front of the drive may blink to indicate various dr...

Страница 25: ...g cartridges To unload a cartridge wait until the drive activity LED is OFF and then press the Drive activity Light Eject button The drive automatically unloads and ejects a cartridge when the Eject b...

Страница 26: ...ridge and pull it from the drive Manual ejection If the power fails with a cartridge in the drive and the procedure above does not work you may be able to remove the cartridge manually However there i...

Страница 27: ...located in the upper left corner of the cartridge You can set the tab to keep data from being written on the tape Use this switch when you want to make sure that important data on the tape will not be...

Страница 28: ...t wet or submerge a cartridge in any liquid Do not expose the cartridge to temperature extremes Allow the cartridge to assume room temperature slowly Retensioning the tape cartridge is always recommen...

Страница 29: ...a 1 405 936 1234 Seagate web site http www seagate com Before you call technical support be sure that you have the documentation for your computer and for all installed peripheral devices Initial chec...

Страница 30: ...ps immediately Check the cartridge for tape run off or excessive torque Replace cartridge if required Drive will not write but will read previously written tapes Make sure the cartridge is not write p...

Страница 31: ...ve in Device Manager If shown as Unknown Device use procedures to cause drive to be seen as a tape drive Add device driver as necessary Tape won t load Ensure that 5 12 volt power is plugged into tape...

Страница 32: ...try Stdiag test If test write read passes retry backup If backup fails replace the tape Slow backups Check installation configuration per Seagate Travan 40 User Guide Tape drive and hard drive should...

Страница 33: ...firmware upgrade cartridge record switch to the non record position Insert the firmware upgrade cartridge in the drive and observe the green LED light on the front of the drive 3 Once the upgrade cart...

Страница 34: ...duct Manual If after a repeat loading of the firmware cartridge the same condition is observed contact your Seagate sales representative Firmware upgrade cartridges are available to qualified Seagate...

Страница 35: ...standard ATA 2 connector The pin assignments for this connector are listed in the following table for your reference Pin Assignment Description Source 1 RESET Reset Host 2 Gnd Ground N A 3 DD7 Data B...

Страница 36: ...AG Passed Diagnostics Device 35 DA0 Device Address Bit 0 Host 36 DA2 Device Address Bit 2 Host 37 CS0 Chip Select 0 Host 38 CD1 Chip Select 1 Host 39 DASP Device Active or Slave Present Device 40 Grou...

Страница 37: ...AD UNLOAD 33 1D SEND DIAGNOSTIC 81 1E PREVENT ALLOW MEDIA REMOVAL 66 2B LOCATE 35 34 READ POSITION 71 3B WRITE BUFFER 87 3C READ BUFFER 69 4C LOG SELECT 36 4D LOG SENSE 37 Specification compliance The...

Страница 38: ...lly erased or overwritten If the ERASE command is issued when the drive is not at BOT no erase operation will be performed and the drive will return an Illegal Request Sense Key This command is used t...

Страница 39: ...ier SCSI Device Type 01 1 RMB Reserved 80 2 ISO Version ECMA Version ANSI Version 0X 3 0 TrmIOP 0 0 Response Data Format 42 4 Additional Length 31 5 Reserved 00 6 Reserved 00 7 0 0 0 Sync 0 0 0 0 10 8...

Страница 40: ...he QIC 121 SCSI 2 inquiry data format or a value of 1h to indicate the SCSI 1 option has been selected Additional Length This field indicates that there are 31 1Fh bytes following this byte Sync The S...

Страница 41: ...and the Sense Key will be set to 2h Not Ready after successful execution of an UNLOAD command CDB for LOAD UNLOAD Command Data Bits Byte 7 6 5 4 3 2 1 0 Hex 0 0 0 0 1 1 0 1 1 1B 1 0 0 0 0 0 0 0 IMM 0...

Страница 42: ...tial Loaded Ready 1 1 0 Retension and set Unload status Unloaded Not Ready Unloaded NR X X 0 Check Condition Not Ready Unloaded Not Ready Unloaded NR 0 0 1 Load cartridge and Position to BOT Ready Unl...

Страница 43: ...ress LSB XX XX XX XX 7 0 0 0 0 0 0 0 0 00 8 Partition XX 9 0 0 0 0 0 0 0 0 00 CP The Change Partition bit determines if a partition change is required before positioning to the requested block When se...

Страница 44: ...ual to 0 to reset CERTAIN FIELDS OF Log Sense Page 03h see their respective definitions If PCR bit is 1 and the parameter list length is greater than 0 the command will terminate with Check Condition...

Страница 45: ...e Parameter Pointer field other than 0 the command is terminated with Check Condition status The Sense Key will be set to Illegal Request and the additional Sense Code will be set to Invalid Field in...

Страница 46: ...are coded as shown indicating the valid page codes Code Page Description 00h Supported Log Pages 03h Error Counter For Read 2Eh TapeAlert if enabled via Log Select page 32 byte 17 bit 7 31h Tape Capac...

Страница 47: ...s ETC The Enable Threshold Comparison bit is always set to 0 indicating comparison to the threshold value is not performed whenever the cumulative value is updated TMC The Threshold Met Criteria bits...

Страница 48: ...ntage of TapeAlert you need TapeAlert compatible tape drives and TapeAlert compatible backup software TapeAlert firmware constantly monitors the drive hardware and the media checking for errors and po...

Страница 49: ...check all 64 flags to discover which are set there may be more than one The definitions of the 64 flags are device type specific so that there is one definition for tape drive autoloader devices and...

Страница 50: ...drive hardware errors Flags 40 to 64 For tape autoloader errors TapeAlert Flags No Flag Type Required Host Message Cause 1 Read Warning W The tape drive is having problems reading data No data has be...

Страница 51: ...Eject C The operation has failed because the tape cartridge was manually ejected while the tape drive was actively writing or reading Manual or forced eject while drive actively writing or reading 17...

Страница 52: ...and off The drive has a hardware fault that is not read write related or requires a power cycle to recover 32 Interface W The tape drive has a problem with the Host interface 1 Check the cables and c...

Страница 53: ...maining Capacity Data Partition LSB XX XX XX XX C D MSB Parameter Code LSB 00 02 E DU DS TSD ETC TMC 0 LP 40 F Parameter Length 04 10 11 12 13 MSB Remaining Capacity Directory Partition LSB XX XX XX X...

Страница 54: ...Update bit is always set to 1 DS The Disable Save bit is always set to 1 indicating the drive does not save parameter values TSD The Target Save Disable bit is always set to 1 indicating the drive do...

Страница 55: ...ode LSB 00 01 16 DU DS TSD ETC TMC 0 LP 40 17 Parameter Length 03 18 1A MSB Cartridge Insertions LSB XX XX XX 1B 1C MSB Parameter Code LSB 00 02 1D DU DS TSD ETC TMC 0 LP 40 1E Parameter Length 04 1F...

Страница 56: ...ters ETC The Enable Threshold Comparison bit is always set to 0 indicating comparison to the threshold value is not performed whenever the cumulative value is updated TMC The Threshold Met Criteria bi...

Страница 57: ...nings The longest calculated time interval in minutes between cleaning cycles It is compared to the Time Since Last Cleaning value after every successful cleaning cycle and the greatest value is retai...

Страница 58: ...cating comparison to the threshold value is not performed whenever the cumulative value is updated TMC The Threshold Met Criteria bits are used with the ETC bit and are always set to 00b LP The List P...

Страница 59: ...meters Page 11h Media Partition Parameters Page 0Fh Data Compression Parameters and Page 20h Forced Streaming Parameters Parameter List Length PLL This field specifies the number of bytes for the Para...

Страница 60: ...r of bytes in the Block Descriptor This value is 08 Block Descriptor Data Bits Byte 7 6 5 4 3 2 1 0 Hex 0 Density Code 45h 1 2 3 MSB Number of Blocks LSB 00 00 00 4 0 0 0 0 0 0 0 0 00 5 6 7 MSB Block...

Страница 61: ...be changed by the Host PER A Post Error Reporting bit of 1 instructs the drive to report Check Condition status on a recovered error A 0 instructs the drive not to report Check Condition status on a...

Страница 62: ...n the Block Descriptor is used to specify the format Active Format The field specifies the format to be sued when the tape is positioned at BOT and CAF is set to 1 Refer to Density Code field for vali...

Страница 63: ...d will be reported in MODE SENSE NOTE If Speed Code 0h is used with AVC on the drive will default to 92 ips 2 0 Mbytes Sec native transfer rate If the system is unable to sustain streaming at that rat...

Страница 64: ...dditional Partitions Defined 00 4 FDP SDP IDP PSUM 0 0 0 XX 5 Media Format Recognition 03 6 0 0 0 0 0 0 0 0 00 7 0 0 0 0 0 0 0 0 00 Additional Page Length shall be set to 6 Maximum Additional Partitio...

Страница 65: ...set to 0 When this bit is set to 0 this indicates that the logging of informational exception conditions within a target is vendor specific When this bit is set to 1 the target shall log informationa...

Страница 66: ...porting that an informational exception condition has occurred The target shall not report informational exception conditions more frequently than the specified timer interval and as soon as possible...

Страница 67: ...s reported and thus needs to be repeated 0 3 Conditionally generate Recovered Error This method instructs the device server to report information exception conditions if reporting of recovered errors...

Страница 68: ...rver by issuing an unsolicited REQUEST SENSE command The Sense Key shall be set to No Sense and the additional Sense Code shall indicate the cause of the informational exception condition which is 5D0...

Страница 69: ...es the type of values to be returned for Parameter Page Bit 7 Bit 6 Type of Parameter Values to be Returned 0 0 Current Values 0 1 Changeable Values 2 1 0 Default Values 2 1 1 Saved Values 1 2 Note 1...

Страница 70: ...led in the drive 00h indicates no cartridge or unknown cartridge See table below for valid cartridge codes Code Cartridge Type 00h No cartridge cleaning cartridge or type unknown 85h Travan 5 95h Trav...

Страница 71: ...y Code XXh 1 2 3 MSB Number Of Blocks LSB 00 00 00 4 0 0 0 0 0 0 0 0 00 5 6 7 MSB Block Length LSB XX XX XX Density Code This byte identifies the bit density and format of the media used by the drive...

Страница 72: ...change depending on cartridge type and drive status SPREV If the SPREV bit is set the device supports SPACE in the reverse direction RO If the RO bit is set the device is operating in read only mode T...

Страница 73: ...dicates the maximum data rate the device supports This value is the maximum sustained native data transfer rate of the device returned in 1000 byte per second units Continuous Transfer Limit This fiel...

Страница 74: ...and cartridge unloading via the front panel Eject button or the UNLOAD command is allowed When set to 1 a PREVENT command is indicated Following this command an UNLOAD command or an Eject button push...

Страница 75: ...Transfer Length LSB XX XX XX 5 0 0 0 0 0 0 0 0 00 SILI Suppress Illegal Length Indicator SILI applies only to the variable block length mode which is not supported by ATAPI interface tape drives The c...

Страница 76: ...AD process e g REWIND See REQUEST SENSE bytes 14 15 and LOG SENSE Page 3 Data Under Run Counter This counter is incremented each time a buffer overrun causes the tape to reposition The counter is clea...

Страница 77: ...d to the Host Mode Type Description 0 1h Reserved 2h Data Only Mode The drive will send the data only and no header 3 7h Reserved Buffer I D The data buffer is divided into 256 equal segments of 2048...

Страница 78: ...gate Travan 40 Product Manual READ BUFFER Header Mode 00h Data Bits Byte 7 6 5 4 3 2 1 0 Hex 0 0 0 0 0 0 0 0 0 00 1 2 3 MSB Buffer Capacity LSB XX XX XX Buffer Capacity This field specifies the total...

Страница 79: ...0 0 0 0 0 0 0 00 BT The Block Address Type bit determines the reporting method of the block location field If 0 the logical addresses are returned for current block and the last block in the data buf...

Страница 80: ...hat the first and last block locations are not known or cannot be obtained Partition Number The Partition Number reports the current partition position 00h indicates the Data partition 01h indicates t...

Страница 81: ...0 0 0 0 0 1 1 03 1 0 0 0 0 0 0 0 0 00 2 0 0 0 0 0 0 0 0 00 3 0 0 0 0 0 0 0 0 00 4 Transfer Length XX 5 0 0 0 0 0 0 0 0 00 The REQUEST SENSE command returns a Check Condition status only upon a catast...

Страница 82: ...a Filemark has been encountered during a read operation EOM The End of Media bit when set to 1 indicates the tape has reached the Logical Early Warning Point ILI The Illegal Length Indicator when set...

Страница 83: ...the Physical Early Warning hole on the tape Note that the EOM bit in byte 02h denotes the Logical Early Warning Point UDE Unrecoverable Data Error BNL Block Not Located Cleared by a successful MEDIA A...

Страница 84: ...ion performed by the target Details may be determined by examining the additional sense bytes and the information bytes When multiple recovered errors occur during one command the choice of which erro...

Страница 85: ...not match the data read from the media F Reserved Reserved Sense Code ASC and ASC Qualifier Assignments Sense Key ASC ASCQ Meaning 00 00 00 Normal 00 00 00 Illegal length 00 00 00 Busy 00 00 00 Comma...

Страница 86: ...llowed because of previous Prevent Allow CDB command 06 28 00 Media just came ready normal status after cartridge insertion 06 29 00 Drive was just initialized normal status after power on 06 2A 00 Mo...

Страница 87: ...ATAPI Interface Chapter 5 Seagate Travan 40 Product Manual Page 79 Sense Key ASC ASCQ Meaning 0D 00 00 Physical end of medium detected...

Страница 88: ...yte 7 6 5 4 3 2 1 0 Hex 0 0 0 0 0 0 0 0 1 01 1 0 0 0 0 0 0 0 IMM 0X 2 0 0 0 0 0 0 0 0 00 3 0 0 0 0 0 0 0 0 00 4 0 0 0 0 0 0 0 0 00 5 0 0 0 0 0 0 0 0 00 IMM Immediate Not applicable for ATAPI drives Ap...

Страница 89: ...ests on it Except when the Self Test bit is one this command is usually followed by a Receive Diagnostic Results command CDB for SEND DIAGNOSTIC command Data Bits Byte 7 6 5 4 3 2 1 0 Hex 0 0 0 0 1 1...

Страница 90: ...he number of logical not physical data blocks to be spaced over is determined by the Count Field If a Filemark or EOD is encountered while spacing over data blocks tape movement is stopped and the com...

Страница 91: ...a block is encountered the count is restored to its original value and the space operation continues following the data block If Logical Early Warning is encountered the command continues to normal co...

Страница 92: ...ready and a tape cartridge is installed TEST UNIT READY does not initiate the internal diagnostic self test The drive does not disconnect during execution of this command CDB for TEST UNIT READY comma...

Страница 93: ...ta block or Filemark read correctly CDB for VERIFY command Data Bits Byte 7 6 5 4 3 2 1 0 Hex 0 0 0 0 1 0 0 1 1 13 1 0 0 0 0 0 IMM BytCmp FBM 0X 2 3 4 MSB Length Of Verification LSB XX XX XX 5 0 0 0 0...

Страница 94: ...s to write the block correctly The physical or logical End of Media has been reached When the command terminates for a reason other than the first the residue can be obtained with a REQUEST SENSE comm...

Страница 95: ...MSB Transfer Length LSB XX XX XX 9 0 0 0 0 0 0 0 0 00 MODE The Mode Bits determine the operation and format as indicated in the table below Mode Bits 2 1 0 Description 0 0 0 Reserved 0 0 1 Reserved 0...

Страница 96: ...to be written into the Buffer by the Host The value includes the four byte Header WRITE BUFFER Header Mode 000b Data Bits Byte 7 6 5 4 3 2 1 0 Hex 0 0 0 0 0 0 0 0 0 00 1 2 3 MSB Buffer Capacity LSB 0...

Страница 97: ...ta in the Data Buffer to tape and no Filemarks are written but an EOD frame will be written If it is successful the drive issues a Good Status If not it issues a Check Condition Status 02 The Sense In...

Страница 98: ...Chapter 5 ATAPI Interface Page 90 Seagate Travan 40 Product Manual be avoided by simply insuring the cartridge is removed from the drive following any WRITE or WRITE FILEMARK operations...

Страница 99: ...NTIFY PACKET DEVICE PACKET Power Management Feature Set CHECK POWER MODE IDLE IDLE IMMEDIATE SLEEP STANDBY STANDBY IMMEDIATE Much of this section is taken directly from the ATA 4 specification Informa...

Страница 100: ...Chapter 5 ATAPI Interface Page 92 Seagate Travan 40 Product Manual Opcode Hex Command Ref page E3 IDLE 105 E5 CHECK POWER MODE 93 E6 SLEEP 111 EC IDENTIFY DEVICE 97 EF SET FEATURES 109...

Страница 101: ...unt N A N A Sector Number N A N A Byte Count High N A N A Byte Count Low N A N A Device Head rsvd LBA rsvd DEV SAM LUN not used Command command E5 Host Taskfile Registers Normal Outputs Data Bits Host...

Страница 102: ...n Host Taskfile Registers Inputs Data Bits Host Taskfile Register 7 6 5 4 3 2 1 0 HEX Features N A N A Sector Count N A N A Sector Number N A N A Byte Count High N A N A Byte Count Low N A N A Device...

Страница 103: ...XECUTE DEVICE DIAGNOSTIC sequence Error information is returned as a diagnostic code in the Error register Host Taskfile Registers Inputs Data Bits Host Taskfile Register 7 6 5 4 3 2 1 0 HEX Features...

Страница 104: ...code Passed or is not present 01 Passed Passed or is not present 81 Passed Failed See the Error register of Device 1 for details 80 82 FF Failed Bits 6 1 contain an error code Failed See the Error re...

Страница 105: ...X Features N A N A Sector Count N A N A Sector Number N A N A Byte Count High N A N A Byte Count Low N A N A Device Head rsvd LBA rsvd DEV SAM LUN not used Command command EC Host Taskfile Registers O...

Страница 106: ...er the least significant bits have been transferred the most significant bits bits 31 through 16 of the value shall be transferred on DD 15 0 respectively Some parameters are defined as a string of AS...

Страница 107: ...ved 13 reserved 12 8 command packet set supported by the device 01h sequential access device 7 1 removable media device 6 5 Method device uses when ready for Host to xfer packet data 00 Microprocessor...

Страница 108: ...mode may be selected at a time If an UltraDMA mode is selected then bits 15 8 must be 0 multiword DMA transfer MODE SELECTed 15 11 reserved 10 1 multiword DMA mode 2 is selected 9 1 multiword DMA mod...

Страница 109: ...pported 13 1 READ BUFFER command is supported 12 1 WRITE BUFFER command is supported 11 1 WRITE VERIFY command is supported 10 1 Host Protected Area feature set is supported 9 1 DEVICE RESET command i...

Страница 110: ...and sets supported If words 82 and 83 0000h or FFFFh then command set notification is not supported 15 shall be cleared to 0 14 shall be set to one 13 3 reserved 2 1 Compact Flash feature set is enabl...

Страница 111: ...s 7 Reserved 6 0 Device 0 does not respond when Device 1 is selected 1 Device 0 responds when Device 1 is selected 5 0 Device 0 did not detect the assertion of DASP 1 Device 0 detected the assertion o...

Страница 112: ...160 CFA power mode 1 15 Word 160 supported 14 Reserved 13 CFA power mode 1 is required for one or more commands implemented by the device 12 CFA power mode 1 disabled 11 0 Maximum current in ma 161 1...

Страница 113: ...ost Taskfile Registers Inputs Data Bits Host Taskfile Register 7 6 5 4 3 2 1 0 HEX Features N A N A Sector Count Standby timer setting 00h timeout disabled 01h F0h timeout value 5 secs F1h FBh timeout...

Страница 114: ...ts Host Taskfile Register 7 6 5 4 3 2 1 0 HEX Features N A N A Sector Count N A N A Sector Number N A N A Byte Count High N A N A Byte Count Low N A N A Device Head rsvd LBA rsvd DEV SAM LUN not used...

Страница 115: ...not supported The device will abort the command Host Taskfile Registers Inputs Data Bits Host Taskfile Register 7 6 5 4 3 2 1 0 HEX Features N A N A Sector Count N A N A Sector Number N A N A Byte Co...

Страница 116: ...TAPI Interface Page 108 Seagate Travan 40 Product Manual PACKET ATA Command A0 The PACKET command is used to transfer a device command via a command packet See the section ATAPI Packet Protocol above...

Страница 117: ...1 0 HEX Features Subcommand code Sector Count Subcommand specific Sector Number Subcommand specific Byte Count High Subcommand specific Byte Count Low Subcommand specific Device Head rsvd LBA rsvd DEV...

Страница 118: ...Taskfile Register 7 6 5 4 3 2 1 0 HEX Error rsvd tag type not supported MCH ABRT EOM ILI 00 Sector Count N A N A Sector Number N A N A Byte Count High N A Byte Count Low N A Device Head rsvd LBA rsvd...

Страница 119: ...lly de assert INTRQ and enter Sleep mode after a vendor specific time period of not less that 2 seconds The only way to recover from Sleep mode is with a SOFTWARE RESET SRST a HARDWARE RESET or a DEVI...

Страница 120: ...5 4 3 2 1 0 HEX Features N A N A Sector Count Standby timer setting 00h timeout disabled 01h F0h timeout value 5 sec F1h FBh timeout value 240 30 min FCh timeout 21 minutes FDh timeout period between...

Страница 121: ...0 HEX Features N A N A Sector Count N A N A Sector Number N A N A Byte Count High N A N A Byte Count Low N A N A Device Head rsvd LBA rsvd DEV SAM LUN not used Command command E0 Host Taskfile Registe...

Страница 122: ...except the Directory track Recording data at 192 000 bits per inch BPI the drive can store 20 Gbytes of data on a Travan 40 cartridge Using software data compression these capabilities are typically...

Страница 123: ...related directly to the recorded block on the tape Each new block is given a unique physical number regardless of its contents Logical numbering does not relate to the blocks physically recorded on th...

Страница 124: ...tirety at the beginning of the following track Frames are not split around corner turns The general frame layout 470 data blocks and 40 ECC blocks is illustrated in the table below Data Block 0 Data B...

Страница 125: ...Information 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...

Страница 126: ...n On 1650 Oersted media write equalization provides the benefit of compatibility with Magneto Resistive MR heads MR heads are prone to saturation by low frequency flux with high energy content Equaliz...

Страница 127: ...ns Seagate firmware and the latest technology This drive uses second generation custom LSIs for efficient circuit layout and increased reliability with low power consumption The drives also use flash...

Страница 128: ...the Travan drive the capstan belt motor assembly drives the cartridge which is on a linear slide The cartridge is loaded against the cartridge drive roller which exerts a net radial dynamic force of...

Страница 129: ...ve Flash EEPROM Because the drive uses flash EEPROM electronically erasable programmable read only memory the drive firmware can be easily upgraded when new revisions of the firmware are released The...

Страница 130: ...Figure 19 shows a Travan minicartridge Figure 19 Travan minicartridge The cartridge also provides for write protection so that existing data on the cartridge is not overwritten A write protected cart...

Страница 131: ...instead of using the Host taskfile registers AZIMUTH The angular deviation in minutes of arc of the mean flux transition line from the normal to the cartridge reference plane BEZEL Front panel of dri...

Страница 132: ...ARTRIDGE A Travan cartridge or DC2000 Minicartridge containing 8 mm wide magnetic tape wound on two co planar hubs and driven by an internal belt which is coupled by an internal belt capstan to the ex...

Страница 133: ...accept commands DRIVE This is a short term for disc drive or tape drive DRQ ATAPI Status register bit Data ReQuest This indicates that the device is ready to transfer data to from the Host DSC ATAPI S...

Страница 134: ...rst hard discs were introduced much of the control mechanism was in Host software The introduction of IDE devices moved much of that work inside the device itself IDE CABLE A physical cable connecting...

Страница 135: ...to from a PCI bus PERIPHERAL A device with which the computer communicates The computer generally controls these devices indirectly through the means of a controller another piece of hardware and a p...

Страница 136: ...regard to the maximum and minimum distances between flux transitions SCSI Small Computer Systems Interface This is associated with a set of standards and specifications for hardware and software SERPE...

Страница 137: ...DMA UNCORRECTED BIT ERROR RATE The probability of a bit being in error without using any error correction techniques UNDERRUN A condition developed when the host transmits or receives data at a rate...

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