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SCSI Commands

Quantum DLT 4000 Tape Drive 5-147

5.22 SEND DIAGNOSTIC COMMAND (1DH)

The SEND DIAGNOSTIC command directs the tape drive to perform its self-

diagnostic tests.

Bit

Byte

7 6 5 4 3 2 1 0

0 Operation Code (1Dh)

1 Logical Unit Number PF (0) Rsvd Selftst DevOfl UnitOfl

2 - 4 Reserved

5 Unused Reserved Flag Link

Figure 5–73 SEND DIAGNOSTIC Command Descriptor Block - Data Format

Table 5–71 SEND DIAGNOSTIC Command Data - Field Descriptions

Field Name Description

PF Page Format. Not supported; must be 0.

Selftst Self Test. This bit is used in conjunction with DevOfl and UnitOfl to specify the

type of testing to be done. An explanation is provided in the following

paragraphs.

DevOfl Device Offline. This bit is used in conjunction with Selftst and UnitOfl to specify

the type of testing to be done. An explanation is provided in the following

paragraphs.

UnitOfl Unit Offline. This bit is used in conjunction with Selftst and DevOfl to specify

the type of testing to be done. An explanation is provided in the following

paragraphs.

1 2 ... 242 243 244 245 246 247 248 249 250 251 252 ... 299 300

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Quantum DLT 4000 Manual Pagina 247