Quantum DLT 8000 Handbuch PDF herunterladen (Seite 347)

100

101

SCSI Commands

Quantum DLT 8000 Tape System 5-203

RESERVE UNIT (6) Command (16h) (continued)

An initiator that holds a current reservation may modify that reservation (for example,

to switch third parties) by issuing another RESERVE UNIT (6) command to the tape

drive.

Medium Changer Considerations for RESERVE UNIT (6) Command

The optional Element Reservation feature defined for Medium Change devices as

described in the ANSI SCSI-2 specification is not supported. The RESERVE UNIT

command is defined the same as for the tape drive. The whole loader unit may be

reserved. This is separate from a reservation of the tape drive.

The RESERVE UNIT/ RELEASE UNIT commands operate on a LUN basis. The Medium

Changer and the tape drive are generally handled as different devices. In the case of a

reserved drive LUN, a MOVE MEDIUM command issued to the Medium Changer LUN

cannot insert or remove a tape cartridge to or from a tape drive unless the tape drive is

reserved by the same initiator.

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