PREVENT / ALLOW MEDIA REMOVAL (1Eh)
The PREVENT / ALLOW MEDIA REMOVAL commands enable or disable removing cartridges from the
media changer. A prevent condition inhibits the media changer to remove magazines and open the
Import/Export element. A prevent condition of the media changer shall not affect an UNLOAD command
issued to the tape drive. Also a prevent condition shall not inhibit a front panel LOAD of a cartridge when
the tape drive is empty. A prevent condition is cleared when all initiators issue the Prevent Allow Medium
Removal command with the Prevent field set to 0 (allow cartridge removal). The prevent condition is also
cleared after a power on and after a SCSI Bus reset.
Bit 7 6 5 4 3 2 1 0
Byte
0 Operation Code (1Eh)
1 LUN Reserved
2 Reserved
3 Reserved
4 Reserved Prevent
5 Control
Field descriptions:
Prevent:
When this bit is set, opening of the Import/Export element and unlocking of the magazine functions
are disabled. When the Prevent bit is cleared opening of the Import/Export element and the
unlocking of the magazine functions are enabled.
Chapter 3. Supported SCSI Commands 3-49
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