User's Manual

DLT4000 SCSI Interface
DLT4000/DLT4500/DLT4700 Cartridge Tape Subsystem 8-43
Parameter Block for Parameter Codes 00 and 01
Bit
7 6 5 4 3 2 1 0
0
(MSB)
Parameter Code
1
(LSB)
Byte 2 DU DS TSD ETC TMC Rsvd LP
3 02h
4
(MSB)
Compression Ratio x 100
6
(LSB)
Figure 8-27 Read/Write Compression Ratio LOG SENSE Page Format
Parameter Control Byte
• DU–Disable Update: This bit is always zero.
• DS–Disable Save: Saving parameters is not supported; this bit will always be set
to 1.
• TSD–Target Save Disable: Saving parameters is not supported; this bit will
always be set to 1.
• ETC–Enable Threshold Comparison: Threshold checking is not supported on this
page; this bit is always a zero.
• TMC–Threshold Met Criteria: Always a zero.
• LP–List Parameter: This bit will always be set to zero, as we treat the parameter
codes as data counter.
Compression Ratio
The compression ratio is reported as the actual compression ratio times 100.