SCSI Commands

MODE SENSE (6) / (10) Command (1Ah / 5Ah) (continued)

Table 5–57 Device Configuration Page - Field Descriptions

Field Name

Description

 

 

PS

Parameters Savable. Not supported; must be 0.

Additional Page Length

This field indicates the number of bytes in the page. Note that this

 

value does not include bytes 0 and 1. The length is returned on

 

MODE SENSE and must subsequently be set to the same value when

 

performing MODE SELECT.

CAP

Change Active Partition. Not supported.

CAF

Change Active Format. Not supported.

Active Format

Not supported.

Active Partition

This field indicates the current logical partition number in use. Only

 

partition 0 is supported.

WRITE Buffer Full Ratio

Indicates how full the buffer should be before restarting writing to

 

the medium. The tape drive sets this to 0 (unused) since it uses an

 

automatic adaptive mechanism to dynamically adjust its ratio

 

according to the average data rates over the SCSI bus.

READ Buffer Empty Ratio

Indicates how empty the buffer should be before restarting reading

 

from the medium. The tape drive sets this to 0 (unused) since it uses

 

an automatic adaptive mechanism to dynamically adjust its ratio

 

according to the average data rates over the SCSI bus.

WRITE Delay Time

Indicates the maximum time (in 100 ms increments) the drive waits

 

with a partially fully buffer before forcing the data to tape. Note that

 

the buffer full/empty ratio, which is dynamic, can cause data to be

 

written sooner than the WRITE delay time value indicates. The WRITE

 

delay time defaults to 200 ms (C8h). This causes the buffer to be

 

flushed in 20 seconds. Minimum value is 15 (Fh); maximum value is

 

6500 (1964h). This represents a range in delay from 1.5 seconds to

 

11 minutes.

DBR

Data Buffer Recovery. Not supported, must be 0.

BIS

Block Identifiers Supported. Set to 1.

RSmk

Report Setmarks. Not supported, must be 0.

AVC

Automatic Velocity Control. Set to 0.

 

 

Quantum DLT 7000 Tape System

5-119

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Quantum Instruments DLT 7000 manual Device Configuration Page Field Descriptions, Cap
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DLT 7000 specifications

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