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