SCSI Commands

5.26 WRITE BUFFER COMMAND (3Bh)

The WRITE BUFFER command is used with READ BUFFER as a diagnostic function for testing the device data buffer, DMA engine, SCSI bus interface hardware, and SCSI bus integrity. It is also used for downloading and updating DLT microcode (firmware).

Bit

7

 

6

 

5

 

4

 

3

 

2

1

0

Byte

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

 

 

Operation Code (3Bh)

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

Logical Unit Number

 

 

 

Reserved

 

 

Mode

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

 

 

 

 

 

Buffer ID (00h)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(MSB)

 

 

 

 

 

 

 

 

 

 

 

 

3 - 5

 

 

 

 

 

 

 

Buffer Offset

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(LSB)

 

(MSB)

 

 

 

 

 

 

 

 

 

 

 

 

6 - 8

 

 

 

 

 

Parameter List / Data Length

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(LSB)

9

 

Unused

 

 

 

 

Reserved

 

Flag

Link

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 5–82 WRITE BUFFER Command Descriptor Block - Data Format

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Quantum DLT 7000 Tape System

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Quantum Instruments DLT 7000 manual Write Buffer Command 3Bh, Write Buffer Command Descriptor Block Data Format
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DLT 7000 specifications

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