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Chapter 4 SCSI Commands
REPORT LUNS Command (A0h)
DLT-S4 Interface Reference Guide
293
Table 162
REPORT LUNS
Command Descriptor Block —
Field Descriptions
Figure 149 LUN Reporting
Parameter List — Data Format
Field
Description
Select
Report
Specifies the type of logical unit addresses to be reported. All values other than those listed
are reserved.
Value Description
00h
The logical unit addresses reported are limited to the following addressing methods:
• Logical unit addressing
• Peripheral device addressing
• Flat space addressing
01h
The list of logical units only contains well-known logical units, if any.
02h
The list of logical units contains all logical units accessible to the initiator through the
addressed SCSI target port.
Allocation
Length
If the Allocation Length is not sufficient to contain the logical unit number values for all
configured logical units, the 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 149
.
Bit
7
6
5
4
3
2
1
0
Byte
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)