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Chapter 4: SCSI Commands
4-18
July 2004
81-81276-01 Rev A01
4.7.1 Error Detection Summary in LOG SELECT CDB
The following conditions constitute errors that the tape drive detects in relation to the CDB. The
REQUEST SENSE data is set to ILLEGAL REQUEST, INVALID FIELD IN CDB.
•
PCR bit is 1 and parameter list length is not 0.
•
SP bit is 1.
•
A parameter list length would cause a parameter within a valid page to be truncated or otherwise
incompletely initialized.
4.7.2 Operation of LOG SELECT
The LOG SELECT command allows the initiator to modify and initialize parameters within the logs
supported by the tape drive.
There are two ways to initialize the log parameters:
1.
Set the PCR bit in the LOG SELECT CDB, clearing all parameters.
2.
Specify the log page and the parameter value as the log parameters to clear individual pages. You
can clear the following pages in this manner.
If sending multiple pages during this DATA OUT phase, the initiator must send them in ascending
order according to Page Code. Otherwise the command terminates with a CHECK CONDITION
status, with the Sense Key set to ILLEGAL REQUEST, and an Additional Sense Code of INVALID
FIELD IN PARAMETER LIST. The tape drive returns the same status if an unsupported Page Code
appears in any header or if it cannot clear the specified page.
Table 4-10.
LOG SELECT DATA OUT — Phase Codes
Page Code
Page Description
02h
Write Error Counter Page
03h
Read Error Counter Page
32h
Compression Ratio Page
Summary of Contents for DLTtape DLT1
Page 1: ...DLT1 VS80 SCSI Interface Guide...
Page 6: ...DLT1 VS80 SCSI Interface Guide vi July 2004 81 81276 01 Rev A01 Notes...
Page 12: ...Table of Contents xii July 2004 81 81276 01 Rev A01 Notes...
Page 16: ...List of Figures xiv July 2004 81 81276 01 Rev A01 Notes...
Page 20: ...List of Tables xviii July 2004 81 81276 01 Rev A01 Notes...
Page 24: ...Chapter 1 Introduction 1 4 July 2004 81 81276 01 Rev A01 Notes...
Page 32: ...Chapter 2 General SCSI Bus Operation 2 8 July 2004 81 81276 01 Rev A01 Notes...
Page 42: ...Chapter 3 SCSI Messages 3 10 July 2004 81 81276 01 Rev A01 Notes...
Page 181: ......