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SDLT 600 SCSI Interface Guide Chapter 4: SCSI Commands

81-81200-02 REV A01 January 2005 4-205

The REPORT DEVICE IDENTIFIER parameter list contains a 4-byte field that sets the length in bytes

of the parameter list and the drive’s identifier.

Figure 4-111. REPORT DEVICE IDENTIFIER — Data Format

Bit

Byte

7 6 5 4 3 2 1 0

0 – 3

(MSB)

Identifier Length (n – 4)

(LSB)

4 – n Identifier

Table 4-120. REPORT DEVICE IDENTIFIER Parameter Data — Field Descriptions

Field Description

Identifier

Length

Specifies the length in bytes of the Identifier field. If the value of the Allocation

Length field in the CDB is too small to transfer all of the identifier, the length is

not adjusted to reflect the truncation. The identifier length is initially set to 0.

Only a successful SET DEVICE IDENTIFIER command changes the value of the

identifier.

Identifier The value reported is the last value written by a successful SET DEVICE

IDENTIFIER command. Only a successful SET DEVICE IDENTIFIER

command changes the value of the identifier. The identifier value persists through

resets, power cycles, media WRITE operations, and media replacement.

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Quantum 1200 Series DAT Autochanger Guía de usuario Pagina 247