SCSI-2 Drive Command Set
Read (Group 5) Command (A8H)
Chapter 2
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DPO
A Disable Page Out bit of 1 instructs the target not to
store readahead data in cache after the read data has
been transferred to the initiator.
A DPO bit of 0 instructs the target it may store
readahead data in the cache after the read data has
been transferred to the initiator.
NOTE
The DPO bit is ignored in 9.1 and 5.2 Gbyte capacity drives.
FUA
A Force Unit Access bit of 1 indicates that the drive
reads from the disk.
An FUA bit of 0 indicates that data may come from the
cache memory.
Rel Adr
A relative address bit of one indicates that logical block
address specified is a two’s complement offset from the
last logical block address accessed.
A value of 0 indicates that the logical block address is an
absolute address.
Transfer
Length
The Transfer Length field specifies the number of
contiguous logical blocks of data to be transferred.
A value of 0 indicates that no blocks will be transferred
and is not considered an error.
PBA
A Physical Block Address bit of 1 indicates that physical
block addressing is used.
A PBA bit of 0 indicates that logical block addressing is
used.
NOTE
For Write-Once optical disks, blank checking is performed following a
failed read. If the sector is blank, the sense key/additional sense code will
be set to BLANK CHECK/Blank Sector Detected.
Summary of Contents for SureStore Optical 2600fx
Page 1: ...optical drive and library SCSI 2 command reference for models fx ex and mx ...
Page 11: ...Contents x ...
Page 20: ...Chapter 1 1 1 SCSI Command Overview 1 SCSI Command Overview ...
Page 38: ...Chapter 2 2 1 Drive Commands SCSI 2 Drive Commands 2 SCSI 2 Drive Command Set ...
Page 187: ...SCSI 2 Drive Command Set Write Long Command DFH Chapter 2 2 150 ...
Page 188: ...Chapter 3 3 1 Jukebox SCSI 2 Commands 3 Jukebox SCSI 2 Command Set ...
Page 264: ...Appendix A A 1 Drive Error Codes A Drive Error Codes ...
Page 287: ...Drive Error Codes DSP Error Codes Appendix A A 24 ...
Page 288: ...Appendix B B 1 Autochanger Error Codes B Autochanger Error Codes ...
Page 339: ...Autochanger Error Codes Jukebox Micro Move Error Codes Appendix B B 52 ...
Page 340: ...Appendix C C 1 Field Replaceable Units C Field Replaceable Units FRUs ...
Page 345: ...Field Replaceable Units FRUs HP Field Replaceable Units FRUs Appendix C C 6 ...
Page 346: ...Appendix D D 1 Micro Macro Moves D Micro Macro Moves ...
Page 369: ...Micro Macro Moves HP Surestore Optical Micro Move IDs Appendix D D 24 ...
Page 370: ...Appendix E E 1 Disconnect Timeouts E Disconnect Timeout Settings ...
Page 373: ...Disconnect Timeout Settings Disconnect Timeout Settings Appendix E E 4 ...
Page 377: ...Index 4 ...