Prevent / Allow Medium Removal Command (1Eh) - Quantum DLT 8000 Product Manual

5.13 PREVENT / ALLOW MEDIUM REMOVAL Command (1Eh)

This command enables or disables the unloading of the tape cartridge.
Bit 7
Byte
0
1 Logical Unit Number
2 - 3
4
5 Unused
Figure 5–70 PREVENT / ALLOW MEDIUM REMOVAL Command Descriptor Block — Data
Table 5–71 PREVENT / ALLOW MEDIUM REMOVAL Command Descriptor Block —
Field Name
Prevent
6 5
Operation Code (1Eh)
Reserved
Format
Field Descriptions
Description
When set to 1, the UNLOAD button on the drive's front panel is effectively
disabled, and the UNLOAD command does not unload the tape medium
or the cartridge. The PREVENT / ALLOW status in the device is maintained
separately by each initiator.
When set to 0, the prevent state corresponding to that initiator is cleared.
When all initiators have cleared their prevent states, the UNLOAD button
and UNLOAD commands are enabled. By default, after power up , a hard
reset, or Bus Device Reset message, the prevent medium removal
function is cleared.
If a Media Loader device is present, its MOVE MEDIUM command is
prevented from removing a cartridge if PREVENT has been enabled.
Quantum DLT 8000 Tape System
4 3
Reserved
Reserved
Reserved
SCSI Commands
2 1
Prevent
Flag Link
0
5-159