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SCSI Commands
Quantum DLT 7000 Tape System 5-55
LOG SENSE Command (4Dh) (continued)
Bit
Byte
7 6 5 4 3 2 1 0
0 -1
(MSB)
Parameter Code
(LSB)
2 DU DS TSD ETC TMC Rsv’d LP
3 02h
4 - n
(MSB)
Compression Ratio x 100
(LSB)
Figure 5–25 Log Parameters Format for Read / Write Compression Ratio LOG SENSE
Page (Parameter Codes 00h and 01h)
Table 5–28 Log Parameters for Read / Write Compression Ratio LOG SENSE Page Field
Descriptions (Parameter Codes 00h and 01h)
Field Name Description
Parameter
Code
Parameter Codes supported for the READ / WRITE COMPRESSION RATIO page are as
follows (for codes 00h and 01h only; codes 02h through 09h are detailed
separately):
Parameter Code - Description
00h - READ Compression Ratio x 100
01h - WRITE Compression Ration x 100
DU Disable Update. Always 0.
DS Disable Save. Not supported. This bit always set to 1.
TSD Target Save Disable. Not supported. This bit always set to 1.
ETC Enable Threshold Comparison. Threshold checking is not supported on this page.
Always set to 0.
TMC Threshold Met Criteria. Always 0.
LP List Parameter. Always set to 0 (parameter codes treated as data counter).