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SDLT 600 SCSI Interface Guide Chapter 4: SCSI Commands

81-81200-02 REV A01 January 2005 4-207

Figure 4-113. LUN Reporting Parameter List — Data Format

The LUN List Length field contains the length in bytes of the LUN list that can be transferred. The

LUN list length equals the number of logical unit numbers reported multiplied by 8. If the allocation

length in the CDB is too small to allow transfer of information about all of the logical units configured,

the LUN list length value is not adjusted to reflect the truncation.

Allocation

Length

If the Allocation Length is not sufficient to contain the logical unit number values for all

configured logical units, the SDLT tape drive reports as many logical number values as fit

in the Allocation Length.

The format of the report of configured logical units is shown in Figure 4-113.

Bit

Byte

7 6 5 4 3 2 1 0

0 – 3

(MSB)

LUN List Length (n – 7)

(LSB)

4 – 7 Reserved

8 – 15

(MSB)

LUN (first LUN)

(LSB)

(n – 7)

– n

LUN (last LUN, if more than one)

Table 4-121. REPORT LUNS Command Descriptor Block — Field Descriptions (Continued)

Field Description

1 2 ... 244 245 246 247 248 249 250 251 252 253 254 ... 293 294

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Quantum 1200 Series DAT Autochanger Guía de usuario Pagina 249