SCSI Commands

5.18REQUEST SENSE COMMAND (03h)

The REQUEST SENSE command causes the tape drive to transfer detailed sense data to the initiator.

 

Bit

7

 

6

 

5

4

 

3

2

1

 

0

 

Byte

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

 

Operation Code (03h)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

Logical Unit Number

 

 

 

 

Reserved

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2 - 3

 

 

 

 

 

 

Reserved

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

 

 

 

 

 

Allocation Length

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

Unused

 

 

 

 

Reserved

 

Flag

 

Link

 

 

 

 

 

 

 

 

 

Figure 5–72 REQUEST SENSE Command Descriptor Block - Data Format

 

 

 

 

Table 5–69 REQUEST SENSE Command Data - Field Descriptions

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Field Name

Description

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Allocation Length

This field specifies the maximum number of sense bytes to be

 

 

 

 

 

 

returned. The tape drive terminates the transfer when this number of

 

 

 

 

bytes has been transferred or when all available sense data has been

 

 

 

 

 

 

transferred to the host, whichever is less.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Quantum DLT 7000 Tape System

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Image 248
Quantum Instruments DLT 7000 manual Request Sense Command 03h
Page 247 Page 249

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