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SCSI Commands
5-34
Quantum DLT 4000 Tape Drive
LOG SELECT Command (4Ch) (continued)
Table 5–16 LOG SELECT Command Descriptor Block - Field Descriptions (continued)
Field Name
Description
Parameter List
Length
This field specifies the length, in bytes, of the LOG SELECT parameter list to
be transferred from the initiator to the target during the DATA OUT phase. A
parameter list length of 0 indicates that no data is to be transferred. This
condition is not considered an error.
5.7.1 Log Detection Summary in LOG SELECT Command Descriptor Block
The following conditions constitute errors that are detected by the drive in
relation to the CDB. The request sense data is set to ILLEGAL REQUEST,
INVALID FIELD IN CDB.
The conditions that constitute errors are:
•
PCR bit is set to 1 and parameter list is not set to 0.
•
SP bit is set to 1
•
A parameter list length that would cause a parameter within a valid page to
be truncated or otherwise incompletely initialized.
5.7.2 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; this clears all parameters.
2.
Specify the log page and parameter values as the log parameters to clear
individual pages. The following pages can be cleared using this method:
Page Code
Page Description
02h
Write Error Counter Page
03h
Read Error Counter Page
32h
Compression Ratio Page
Summary of Contents for DLTtape DLT 4000
Page 1: ...DLT 4000 Tape Drive Product Manual November 10 2003 81 60043 04 ...
Page 5: ...USER MANUAL STATEMENTS FOR CLASS B EQUIPMENT continued ...
Page 6: ......
Page 24: ...About This Manual Quantum DLT 4000 Tape Drive xxiv ...
Page 62: ...Hardware Implementation 2 28 Quantum DLT 4000 Tape Drive ...
Page 100: ...Messages 4 12 Quantum DLT 4000 Tape Drive ...
Page 264: ...SCSI Commands 5 164 Quantum DLT 4000 Tape Drive ...
Page 274: ...Appendix B EEPROM Resident Bugcheck and Event Logs B 6 Quantum DLT 4000 Tape System ...
Page 280: ...Appendix C Updating the Firmware C 6 Quantum DLT 4000 Tape Drive ...
Page 298: ...Index Index 6 Quantum DLT4000 Tape Drive ...
Page 299: ......