Table of Contents
Advertisement
CDU-541 CD-ROM DRIVE SCSI INTERFACE MANUAL
5.2.14 . PREVENT/ ALLOW MEDIUM REMOV
AI..
Command
==============================================================================
Bitl
Byte
1
7
6
5
4
3
2
1
o
=====-========================================================================
o
Operation Code
(lEh)
I
I
-----------------------------------------------------------------------1
1
Logical Uni t Number
I
Reserved
I
-----------------------------------------------------------------------1
2
Reserved
1
-----------------------------------------------------------------------1
3
Reserved
1
-----------------------------------------------------------------------1
4
I
Reserved
1
Prevent
I
-----1-----------------------------------------------------------------------1
5
I
Control Byte
I
==============================================================================
The PREVENT/ALLOW MEDIUM REMOVAL command requests that the controller enable
or disable the removal of the caddy in the drive.
A prevent bit of one will inhibit the removal of the caddy by use of a
command through the interface or by use of the eject button.
The emergency
release mechanism will not be overridden.
A prevent bit of zero will allow
removal of the caddy.
This prevention of caddy removal condition will terminate upon receipt of a
ALLOW MEDIUM REMOVAL command (i.e. the prevent bit set to zero), or by the
receipt of a BUS DEVICE RESET message from any initiator or by a reset
condition.
If a PREVENT MEDIUM REMOVAL command is issued without the drive being in the
ready condition command will be terminated with a CHECK CONDITION status.
The
sense key will be set to NOT READY and the appropriate additional sense code
will be set.
A ALLOW MEDIUM REMOVAL command may be issued at any time by the initiator
and will not be considered an error.
5-28
Advertisement
Table of Contents
