SCSI-2 Drive Command Set
Mode Select Command (15H)
Chapter 2
2-38
MF
The Multiplication Factor bit is set to 1 and cannot be
changed. This bit is used with the Minimum and
Maximum Pre-fetch fields during READ operations. If
this bit is set to 0 by the MODE SELECT command, a
CHECK CONDITION status is returned with the sense
key/additional sense code set to ILLEGAL REQUEST/
Invalid Parameter List.
Disable Pre-fetch
Transfer
Length
This field sets the threshold value for pre-fetching data
during reads. If the number of blocks to be read is
greater than this value, no pre-fetching occurs.
Minimum
Pre-fetch
The default value is 1 and cannot be changed. If this bit
is set to 0 by the MODE SELECT command, a CHECK
CONDITION status is returned with the Sense Key/
Additional Sense Code set to Illegal Request/Invalid
Parameter List. Since the MF bit is 1 and the Minimum
Pre-fetch bit is also 1, the Minimum Pre-fetch size is
equal to the READ transfer length. This field does not
affect the operation of the drive.
Maximum
Pre-fetch
The default value is 1 and cannot be changed. If this bit
is set to 0 by the MODE SELECT command, a CHECK
CONDITION status is returned with the Sense Key/
Additional Sense Code set to Illegal Request/Invalid
Parameter List. Since the MF bit is 1 and the Maximum
Pre-fetch bit is also 1, the Maximum Pre-fetch size is
equal to the READ transfer length. This field does not
affect the operation of the drive.
Maximum
Pre-fetch
Ceiling
The Maximum Pre-fetch Ceiling field does not affect the
operation of the drive and can be set to 32 or 64. If
another value is set, a CHECK CONDITION status is
returned with the Sense Key/Additional Sense Code set
to Illegal Request/Invalid Parameter List.
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 ...