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Chapter 4 SCSI Commands

MODE SELECT (6) / (10) Command (15h / 55h)

DLT-S4 Interface Reference Guide 121

OIR If the only if reserved (OIR) bit is set to one, the device server will process a

command only if a reservation (see SPC-2) or persistent reservation (see SPC-3)

exists that allows access via the I_T nexus from which the command was

received. If the OIR bit is set to one and a command is received from an I_T

nexus for which no reservation exists, the device server will not process the

command. If the OIR bit is set to one and a command is received from an I_T

nexus for a logical unit upon which no reservation or persistent reservation

exists, the device servers terminates the command with

CHECK CONDITION

status. The sense key is set to

ILLEGAL REQUEST and the additional sense code

is set to

NOT RESERVED. Commands that are not be effected by the OIR bit set

to one are defined as Allowed in the presence of persistent reservations in SPC-

3, or are defined in SPC-2 as Allowed in the presence of reservations.

Commands that are effected by the OIR bit set to one are defined as Conflict in

the presence of persistent reservations in SPC-3, except for the

RESERVE,

RELEASE, PERSISTENT RESERVATION IN, and PERSISTENT RESERVATION OUT

commands, or are defined in SPC-2 as Conflict in the presence of reservations.

An OIR bit set to zero specifies the device server will process commands as

specified in SPC-3.

Rewind on Reset Rewind the tape on a logical unit reset operation. Must be set to 1.

AsocWP Associated Write Protection. Must be set to 0.

PersWP Persistent Write Protection. Must be set to 0.

PrmWP Permanent Write Protection. Must be set to 0.

Field Description

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Quantum DLT-S4 Betriebsanweisung Seite 155