Report Luns Command (A0H) - Seagate Ultra160 Product Manual

SCSI Interface Product Manual, Rev. B
8.37

REPORT LUNS command (A0h)

The REPORT LUNS command (see Table 216) requests that the peripheral device LOGICAL UNIT NUMBERs
of known logical units in the target be sent to the application client. The REPORT LUNS command shall return
information about only those logical units to which commands may be sent. When the HISUPPORT bit is one
(see Table 79, Standard INQUIRY data format), the device server shall support the REPORT LUNS command.
A SCSI device that is capable of supporting a LUN address other than zero should support the REPORT LUNS
command on logical unit zero.
The REPORT LUNS command shall not be affected by reservations or persistent reservations.
Table 216: REPORT LUNS command (A0h)
Bit 7
Byte
0 OPERATION CODE (A0h)
1 Reserved
2 Reserved
3 Reserved
4 Reserved
5 Reserved
6 (MSB)
7
8
9
10 Reserved
11 CONTROL [2]
[1] The ALLOCATION LENGTH shall be at least 16 bytes. If the ALLOCATION LENGTH is less than 16
bytes, the device server shall return CHECK CONDITION status. The sense key shall be set to ILLEGAL
REQUEST and the additional sense data shall be set to INVALID FIELD IN CDB.
The ALLOCATION LENGTH is not sufficient to contain the LOGICAL UNIT NUMBER values for all config-
ured logical units, the device server shall report as many LOGICAL UNIT NUMBER values as will fit in the
specified ALLOCATION LENGTH. This shall not be considered an error.
[2] See Table 61, "CONTROL field," in Section 7.2.1.
6 5
ALLOCATION LENGTH [1]
4 3 2 1
(LSB)
283
0