SCSI Command Overview
Drive Control Commands
Chapter 1
1-16
Conditions
Attention Condition
The Attention Condition allows an initiator to inform the target that the
initiator has a message ready. The target gets this message at its
convenience by performing a Message Out Phase as follows:
1. If the ATN signal becomes true during a COMMAND phase, the drive
enters the MESSAGE OUT phase after transferring part or all of the
command descriptor block bytes.
2. If the ATN signal becomes true during a DATA phase, the drive
enters the MESSAGE OUT phase at the drives earliest convenience.
The initiator will continue REQ/ACK handshakes until it detects the
phase change.
3. If the ATN signal becomes true during a STATUS phase, the drive
enters the MESSAGE OUT phase after the status byte has been
acknowledged by the initiator.
4. If the ATN signal becomes true during a MESSAGE IN phase, the
drive enters the MESSAGE OUT phase before it sends another
message.
5. If the ATN signal becomes true during a SELECTION phase and
before the initiator releases the BSY signal, the drive enters the
MESSAGE OUT phase immediately after that SELECTION phase.
6. If the ATN signal becomes true during a RESELECTION phase, the
drive enters the MESSAGE OUT phase after sending its IDENTIFY
message for that RESELECTION phase.
Reset Condition
The drive implements the hard reset alternative, upon detection of the
RESET condition. When the drive creates the reset conditions, it clears
all I/O processes including queued I/O processes, releases all
reservations, returns any SCSI device operating modes (MODE SELECT,
PREVENT/ALLOW MEDIUM REMOVAL commands, etc.) to their
initial conditions, and generates UNIT ATTENTION condition.
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 ...