HP Q153090901 - Manual (Page 102)

Commands 102
Parameter data
Type The characteristics of the persistent reservation currently held. Persistent reservation types
supported by the drive are:
3h
6h
8h
Exclusive access
Exclusive access, registrants only
Exclusive access, all registrants
Parameter List
Length
The amount of data (in bytes) that should be sent to the drive from the host in parameter
list data.
If the SPEC_I_PT bit in the parameter data is 0, this field is set to 18h.
If SPEC_I_PT is 1, this field specifies the number of bytes of parameter data (minimum is
18h).
7 6 5 4 3 2 1 0
0 (MSB)
Reservation Key
7 (LSB)
8 (MSB)
Service Action Reservation Key
15 (LSB)
16
Obsolete (0)
19
20
Reserved (0) SPEC_1_PT ALL_TG_PT Rsvd(0) APTPL
21 Reserved (0)
22
Obsolete (0)
23
24
(MSB)
Additional Parameter Data
n (LSB)
Reservation Key Identifies the I_T nexus that sent the command. The value must match the registered
reservation key for the I_T nexus except for:
• The Register and Ignore Existing Key service action, where this field is
ignored.
• The Register service action for an unregistered I_T nexus, where this field
is 0.
If the Reservation Key does not match with the one registered in the device server for
the I_T nexus, the device server returns Reservation Conflict.
Service Action
Reservation Key
Information needed for the following service actions: Register, Register and Ignore
Existing Key, Preempt, and Preempt and Abort.
For the Register and Register and Ignore Existing Key service actions:
0 Unregisters the registered reservation key specified in the Reservation Key field.
n The new reservation key to replace the existing one as specified in the
Reservation Key field for the I_T nexus.