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SCSI Commands

Quantum DLT 4000 Tape Drive 5-81

MODE SELECT (6) / (10) Command (15h) / (55h) (continued)

Table 5–41 Device Configuration Page - Field Descriptions (continued)

Field Name Description

Write Delay Time

(cont.)

Values between 0 and 15 on a MODE SELECT are rounded down to 0.

This causes the data to go straight to the medium without delay.

DBR Data Buffer Recovery. Not supported, must be 0.

BIS Block Identifiers Supported. This field is supported. Set to 1.

RSmk Report Setmark. Not supported, must be 0.

AVC Automatic Velocity Control. Not supported; must be 0.

SOCF Stop on Consecutive Filemarks. Not supported; must be 0.

RBO Recover Buffer Order. Not supported; must be 0.

REW Report Early Warning. Not supported; must be 0 (do not report Early

Warning EOM on READ).

Gap Size Not used; must be 0.

EOD Defined End-of-Data Defined. This field must be set to 00h.

EEG Enable End-of-Data Generation. Set to 1. This field indicates that the drive

will generate an EOD. The drive generates an EOD mark before any

change of direction following a WRITE-type operation. This bit is ignored,

however, on MODE SELECT.

SEW Synchronize at Early Warning. Must be set to 1.

Buffer Size at Early

Warning

Not supported; must be 0.

SEW Synchronize at Early Warning. Must be set to 1.

Select Data

Compression

Algorithm

When set to 1, enables data compression. When

0, disables data compression.

The setting on the front panel of the tape drive overrides any setting of

MODE SELECT, but no error will result. If the setting is returned to the

automatic mode on the front panel of the tape drive, the value from the

last MODE SELECT command determines whether compression is

enabled or disabled.

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Quantum DLT 4000 Manual Página 181