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SCSI Commands

Quantum DLT 4000 Tape Drive 5-51

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 Rsvd LP

3 02h

4 - n

(MSB)

Compression Ratio x 100

(LSB)

Figure 5–22 Log Parameters Format for Read / Write Compression Ratio LOG SENSE

Page (Parameter Codes 00h and 01h)

Table 5–25 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).

1 2 ... 146 147 148 149 150 151 152 153 154 155 156 ... 299 300

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Quantum DLT 4000 Manual Página 151