Reference Guide

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)