Table of Contents
Advertisement
Page 96
REPORT LUNS
Command Descriptor Block
Field Descriptions
Report LUNS Data
The host uses this command to retrieve information about which Logical Units the
drive supports. The allocation length shall be at least 16 bytes. If this is not the case,
drive will return Check Condition status and provide a sense key of Illegal Request
and additional sense of INVALID FIELD IN CDB.
The following table shows the layout of the CDB.
Bits
Byte
7
6
0
1
Ignored LUN
2
3
4
5
6
7
8
9
10
11
Field
Bytes
Bits
Operation
0
Code
Ignored
1
5-7
Logical
Unit
Allocation
6-9
Length
Reserved
Control
11
The following header is returned by the Report LUNS command.
Bits
Byte
7
6
0
1
2
3
4
5
6
5
4
3
Operation Code (A0h)
Reserved
Reserved
Reserved
Reserved
Reserved
Allocation Length, MSB
Allocation Length
Allocation Length
Allocation Length, LSB
Reserved
Control
Description
The Operation code for Report LUNS is A0h.
The LUN field is residual from the SCSI-1 days and is ignored.
Specifies the amount of data to be returned, in bytes. Must be at
least 16 bytes or the drive will return Check Condition.
All reserved bits must be 0.
See Control Byte Format on page 18.
5
4
3
LUN List Length, MSB
LUN List Length
LUN List Length
LUN List Length, LSB
Reserved
Reserved
Reserved
LTO SCSI Interface Manual
2
1
0
2
1
0
Advertisement
Table of Contents
