SCSI-2 Drive Command Set
Pre-Fetch (34H)
Chapter 2
2-94
Pre-Fetch (34H)
The Pre-Fetch command is used to transfer the specified number of data
blocks starting from the specified logical block address to cache memory.
Immed
An Immediate bit of 1 indicates that the drive returns a
status as soon as the command descriptor block is
validated.
An Immed bit of 0 indicates that the status is not
returned until the operation is completed.
Transfer
Length
This field indicates the number of contiguous logical
blocks of data to be transferred.
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.
Table 2-81
Pre-Fetch Command
Byte
7
6
5
4
3
2
1
0
0
Operation Code (34H)
1
Reserved (0)
Immed
RelAdr
2
Logical Block Address (MSByte)
3
Logical Block Address
4
Logical Block Address
5
Logical Block Address (LSByte)
6
Reserved (0)
7
Transfer Length (MSByte)
8
Transfer Length (LSByte)
9
Reserved (0)
Flag
Link
Содержание SureStore Optical 2600fx
Страница 1: ...optical drive and library SCSI 2 command reference for models fx ex and mx ...
Страница 11: ...Contents x ...
Страница 20: ...Chapter 1 1 1 SCSI Command Overview 1 SCSI Command Overview ...
Страница 38: ...Chapter 2 2 1 Drive Commands SCSI 2 Drive Commands 2 SCSI 2 Drive Command Set ...
Страница 187: ...SCSI 2 Drive Command Set Write Long Command DFH Chapter 2 2 150 ...
Страница 188: ...Chapter 3 3 1 Jukebox SCSI 2 Commands 3 Jukebox SCSI 2 Command Set ...
Страница 264: ...Appendix A A 1 Drive Error Codes A Drive Error Codes ...
Страница 287: ...Drive Error Codes DSP Error Codes Appendix A A 24 ...
Страница 288: ...Appendix B B 1 Autochanger Error Codes B Autochanger Error Codes ...
Страница 339: ...Autochanger Error Codes Jukebox Micro Move Error Codes Appendix B B 52 ...
Страница 340: ...Appendix C C 1 Field Replaceable Units C Field Replaceable Units FRUs ...
Страница 345: ...Field Replaceable Units FRUs HP Field Replaceable Units FRUs Appendix C C 6 ...
Страница 346: ...Appendix D D 1 Micro Macro Moves D Micro Macro Moves ...
Страница 369: ...Micro Macro Moves HP Surestore Optical Micro Move IDs Appendix D D 24 ...
Страница 370: ...Appendix E E 1 Disconnect Timeouts E Disconnect Timeout Settings ...
Страница 373: ...Disconnect Timeout Settings Disconnect Timeout Settings Appendix E E 4 ...
Страница 377: ...Index 4 ...
Страница 378: ...Copyright 2001 Hewlett Packard Company Printed in U S A Edition 12 2001 www hp com go support Printed on recycled paper ...