Start/Stop Unit Command (1Bh) - HP 2600fx - Optical Disk Drive Command Reference Manual

Start/Stop Unit Command (1BH)

This command starts or stops rotation of the optical disk in the drive
and/or ejects the optical disk from the drive.
Table 2-62 Start/Stop Unit Command CDB
Immed
LoEj
NOTE This command is affected by the Prevent/Allow Medium Removal
command. Do not use LoEj in an autochanger environment.
Start
Chapter 2
Byte 7 6
0
1 Logical Unit Number
(0)
2
3
4
5
An Immediate bit of 1 indicates that status is returned
as soon as the command descriptor block has been
validated.
An Immed bit of 0 indicates that status is returned after
the operation is completed.
A Load Eject bit of 0 requests that no action be taken
regarding loading or ejecting the media.
A Load Eject bit of 1 indicates that the media will be
unloaded if the Start bit is 0.
A Load Eject bit of 1 indicates that the media will be
loaded if the Start bit is 1.
A Start bit of 1 indicates that the drive starts rotating
the optical disk. A Start bit of 0 indicates that the drive
stops rotating the optical disk.
Start/Stop Unit Command (1BH)
5 4 3
Operation Code (1BH)
Reserved (0)
Reserved (0)
Reserved (0)
Reserved (0)
Reserved (0)
SCSI-2 Drive Command Set
2 1 0
Immed
LoEj Start
Flag Link
2-73