SCSI Commands
5-10
Quantum DLT 8000 Tape System
Table 5–5 DATA-Phase Command Contents (continued)
Command
Length in CDB
Data Out
(To Drive)
Data In
(To Initiator)
REPORT LUNS
Allocation
---
Supported LUNS List
REQUEST SENSE
Allocation
---
Sense Data (18)
RESERVE UNIT
0
(Extent List Option
not supported)
---
---
REWIND
0
---
---
SEND DIAGNOSTIC
Parameter List
Diagnostic Page
---
SPACE
0
---
---
TEST UNIT READY
0
---
---
VERIFY
Transfer
Data
---
WRITE
Transfer
Data
---
WRITE BUFFER
Parameter List
Microcode Image Data
---
WRITE FILEMARKS
---
---
---
5.1.5 Unit Attention Condition
Queued Unit Attentions are implemented on the Quantum DLT 8000 tape drive and are
maintained separately for each valid LUN for each initiator. Unit Attentions are created
in each of the following circumstances:
•
At Power On
•
At Bus Reset
•
At Bus Device Reset message
•
When the medium may have changed asynchronously
•
When another initiator changes the Mode Parameters
•
When a firmware (microcode) update has completed
Two queued Unit Attentions are not unusual. For example, if a unit is powered up and a
tape cartridge is loaded, Power Up and Not-Ready to Ready Transition Unit Attentions
are created. Due to the limited number of Unit Attention buffers, if an initiator does not
clear Unit Attentions queued for it, at some point the tape drive stops generating new
Unit Attentions for that initiator-logical unit combination (existing ones will be left
queued, however).
A LOAD command does not generate a Unit Attention for the initiator that issued the
command since the transition to Ready is synchronous.
Summary of Contents for DLTtape DLT 8000
Page 1: ...DLTTM 8000 Tape System Product Manual Nov 10 2003 81 60118 06...
Page 5: ...USER MANUAL STATEMENTS FOR CLASS B EQUIPMENT continued...
Page 6: ......
Page 26: ...Table of Contents xxiv Quantum DLT 8000 Tape System...
Page 36: ...About This Manual Quantum DLT 8000 Tape System xxxii...
Page 54: ...General Description and Specifications 1 18 Quantum DLT 8000 Tape System...
Page 102: ......
Page 372: ......
Page 376: ...Appendix A Definition of Vendor Unique Sense Data Information A 4 Quantum DLT 8000 Tape System...
Page 386: ...Appendix C Updating the Firmware C 6 Quantum DLT 8000 Tape System...
Page 396: ...Appendix E Visual Inspection Procedure for DLTtape Cartridges E 8 Quantum DLT 8000 Tape System...
Page 406: ...Appendix G DLT 7000 Emulation Feature G 8 Quantum DLT 8000 Tape System...
Page 407: ......