Optical Drive and Library SCSI-2 Command Reference
SCSI-2 Drive Command Set
Numerical List of Commands
Chapter 2 2-3
SCSI-2 Drive Commands
17H Release Releases a specified logical 
unit from the reservation 
state
2-53
1AH Mode Sense Reads optical disk, drive unit, 
or controller unit parameters
2-54
1BH Start/Stop Unit Starts or stops rotating the 
optical disk, and/or ejects the 
optical disk from the drive 
unit
2-73
1CH Receive 
Diagnostic 
Results
Requests analysis data be 
sent to the initiator
2-74
1DH Send Diagnostic Requests the disk controller 
to perform diagnostic tests
2-76
1EH Prevent/Allow 
Medium 
Removal
Prevents or allows removal of 
the optical disk in the logical 
unit
2-79
Table 2-1 Group 0 Commands (6-byte command)
Code
(hex.)
Name  Description Page 
Number 










