Quantum Instruments DLT 7000 manual Prevent / Allow Medium Removal Command 1Eh

SCSI Commands

5.11PREVENT / ALLOW MEDIUM REMOVAL COMMAND (1Eh)

This command enables or disables the unloading of the tape cartridge.

Bit	7		6	5	4	3	2	1	0
Byte
0					Operation Code (1Eh)
1		Logical Unit Number					Reserved
2 - 3					Reserved
4					Reserved				Prevent
5		Unused			Reserved			Flag	Link

Figure 5–60 PREVENT / ALLOW MEDIUM REMOVAL Command Descriptor Block -

Data Format

Table 5–60 PREVENT / ALLOW MEDIUM REMOVAL Command Descriptor Block -

Field Descriptions

Field Name	Description
Prevent	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 7000 Tape System	5-127