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SCSI Commands
5-38
Quantum DLT 8000 Tape System
LOG SELECT Command (4Ch) (continued)
Table 5–16 LOG SELECT Command Descriptor Block — Field Descriptions
Field Name
Description
PCR
Parameter Code Reset. If this bit is set to 1 and the parameter list length
is set to 0, all accumulated values of page codes 2, 3, and 32 are set to 0
and all threshold values are set to default. If PCR is set to 1 and the
parameter list length is set to a non-zero value, the command terminates
with a CHECK CONDITION status with sense key of ILLEGAL REQUEST and
an additional sense code (ASC) of INVALID FIELD IN CDB.
SP
Save Page. Not supported, must be set to 0. If for some reason the Save
Page bit is set, the command terminates with a CHECK CONDITION
status with a sense key of ILLEGAL REQUEST and an ASC of INVALID FIELD
IN CDB.
PC
Page Control. This field defines the type of parameter values to be
selected:
PC Type of Parameter Values
00b
Current Threshold Values
01b
Current Cumulative Values
10b
Default Threshold Values
11b
Default Cumulative Values
All of these types of values are changeable using LOG SELECT.
•
When the PC field is set to 00b or 01b and the Parameter List Length
is set to 0, the command terminates with a CHECK CONDITION
status, Sense Key of ILLEGAL REQUEST, and ASC of INVALID FIELD IN
CDB. This occurs because modification of Current Threshold Values
and Current Cumulative Values is not supported.
•
When the PC field is set to 10b and the Parameter List Length field is
set to 10b, then all Current Threshold Values are reset to the Default
Threshold Values. This is equivalent to no change, since
Threshold
Values cannot be modified.
•
When the PC field is set to 11b and the Parameter List Length field is
set to 0, then all Current Cumulative Values are reset to the Default
Cumulative Values. This is equivalent to clearing all log pages that
can be cleared.
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.
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...
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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...
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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...
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