HP 220mx Optical Drive and Library SCSI-2 Command Reference - Page 45
Test Unit Ready Command (00H),
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Table 2-4 SCSI-2 Drive Command Set Test Unit Ready Command (00H) Test Unit Ready Command (00H) This command determines the READY state of a drive. If the drive is in a READY state when it receives this command, it returns a GOOD status. A drive is in the READY state when the optical disk is loaded and spun up, and a read or write operation could successfully complete. If the drive is not ready when it receives this command, it returns a CHECK CONDITION with a sense key of NOT READY. Test Unit Ready Command CDB Byte 7 6 5 4 3 2 1 0 0 Operation Code (00H) 1 Logical Unit Number (0) Reserved (0) 2 Reserved (0) 3 Reserved (0) 4 Reserved (0) 5 Reserved (0) Flag Link 2-8 Chapter 2
SCSI-2 Drive Command Set
Test Unit Ready Command (00H)
Chapter 2
2-8
Test Unit Ready Command (00H)
This command determines the READY state of a drive. If the drive is in a
READY state when it receives this command, it returns a GOOD status.
A drive is in the READY state when the optical disk is loaded and spun
up, and a read or write operation could successfully complete.
If the drive is not ready when it receives this command, it returns a
CHECK CONDITION with a sense key of NOT READY.
Table 2-4
Test Unit Ready Command CDB
Byte
7
6
5
4
3
2
1
0
0
Operation Code (00H)
1
Logical Unit Number
(0)
Reserved (0)
2
Reserved (0)
3
Reserved (0)
4
Reserved (0)
5
Reserved (0)
Flag
Link