Persistent Reserve Out (5F) - Fujitsu MAX3073NC - SCSI,80, Dell DC961,Hard Drive Scsi Logical Interface Specifications

Command Specifications
3.1.19

PERSISTENT RESERVE OUT (5F)

Bit 7
Byte
0
1 0
2
3 0
4 0
5 0
6 0
7 (MSB)
8
9
The PERSISTENT RESERVE OUT command reserves a logical unit for exclusive or shared use by a
particular initiator. This command is used in combination with the PERSISTENT RESERVE IN
command. However, this command is not associated with the RESERVE or RELEASE command.
The persistent reservation conflicts with the reservation requirements specified by the RESERVE
command (RESERVATION CONFLICT). The initiator defines the reservation key. The reservation
key identifies the initiator that executes a service action of the PERSISTENT RESERVE OUT
command. The initiator can verify which initiators have caused conflicts with the reservation
requirements and which initiators hold invalid reservation requirements. If necessary, the initiator can
also preempt reservation rights by issuing the PERSISTENT RESERVE OUT command.
The set reservation requirements are not reset by processing such as the TARGET RESET task.
Therefore, a persistent reservation can be used for sharing a device among multiple initiators. The
PERSISTENT RESERVATION OUT and PERSISTENT RESERVATION IN commands provides basic
features for analyzing the dynamically changeable reservation status on a multi-initiator system using
multi-port targets. These commands can identify whether a particular reservation requirement is held.
They can also eliminate the requirements from an initiator that has an error or is not cooperative.
When a drive receives this command and a reservation requirement has been held by the
RESERVE/RESERVE EXTEND command, the command is rejected and returned with the
RESERVATION CONFLICT status.
When this command is issued, if an invalid drive resource exists, the drive returns the "CHECK
CONDITION" status.
INSUFFICIENT REGISTRATION RESOURCES [=55-04].
(However, SCSI devices do not report sense information.)
3-62
6 5 4
0 0
Scope
0 0 0
0 0 0
0 0 0
0 0 0
Parameter List Length (18h)
The sense key is set to ILLEGAL REQUEST [=5]. Sense data is set to
3 2
X'5F'
Service Action
Type
0 0
0 0
0 0
0 0
Control
1 0
0 0
0 0
0 0
0 0
(LSB)
C141-C010