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ACL 4/52 Software Interface Guide
Document 6211225-03
Version 3.0
Destination Element Address
Invert
3-38
The destination address specifies the location to which the
medium transport element is moved.
The medium changer does not support medium rotation for
handling double-sided media. The invert bit must be set to zero.
Prevent/Allow Medium Removal (1Eh)
The Prevent/Allow Medium Removal Command requests the target
to disable or enable, respectively, the removal of medium by not
allowing the user to open the load port door.
This does not allow medium removal if any initiator currently has
medium removal prevented. However, if the door is already opened
the user can still close the door.
The prevention of medium removal begins when the initiator issues a
Prevent/Allow Medium Removal Command with a prevent bit of one
(medium removal prevented). The prevention of medium removal for
the logical unit terminates:
After the initiator (that has medium removal prevented) issues a
Prevent/Allow Medium Removal Command with a prevent bit of
zero and the target has successfully performed a synchronize cache
operation
Upon the receipt of a Bus Device Reset message from the initiator
After a Hard Reset
While a prevention of medium removal condition exists, the target
inhibits mechanisms that normally allow removal of the medium by
an operator.
SCSI Interface
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