Table 49 Persistent Reserve Out Parameter List - Dell PowerVault ML6000 Reference Manual

Scope – Only logical unit scope is supported, and this field must be a 0h.
Type – This field specifies the type of reservation as follows:
• 3h Exclusive Access – The initiator holding the persistent reservation has exclusive read and
write access. Requests from any other initiators to transfer data to or from the logical unit will result
in a Reservation Conflict.
• 6h Exclusive Access, Registrants Only – Any currently registered initiator has exclusive data
transfer access. Requests from unregistered initiators to transfer data to or from the logical unit will
result in a Reservation Conflict.
Parameter List Length – This field returns 18h (24) to indicate the length of the PERSISTENT RESERVE
OUT parameter list, which is shown in the following table.
Table 49 PERSISTENT RESERVE OUT parameter list
Bit
7
Byte
0
7
8
15
16
19
20
21
22
23
Reservation Key – This is an 8-byte reservation key that identifies the initiator.
Service Action Reservation Key – This field only applies to the following service actions as follows:
• Register – This is the new reservation key to register.
• Register and Ignore Existing Key – This is the new reservation key to register.
• Preempt – This is the reservation key of the persistent reservation to preempt.
• Preempt and Abort – This is the reservation key of the persistent reservation to preempt.
Scope-Specific Address – Element reservations are not supported and this field must be 0000h.
Activate Persist Through Power Loss (APTPL) – Persistent reservations are not supported across power
cycles, so this field must be 0.
50
6 5 4
Reservation Key
Service Action Reservation Key
Scope-Specific Address
Reserved
Reserved
Obsolete
3 2 1
SCSI Commands
0
APTPL