Dell PowerVault TL4000 SCSI Reference Guide - Page 57

PERSISTENT, RESERVE, Parameter, Reservation, Descriptor

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Bit 7 6 Byte n - 7 (MSB) n 5 4 3 2 Last reservation key 1 0 (LSB) Field descriptions: Generation: See SPC-3 r23. Additional Length: See SPC-3 r23. Reservation Key List: See SPC-3 r23. PERSISTENT RESERVE IN Parameter Data for Read Reservation The format for the parameter data provided in response to a PERSISTENT RESERVE IN command with the Read Reservation service action is shown below: Bit 7 6 Byte 0 (MSB) 3 4 (MSB) 7 5 4 3 2 Generation Additional length (n - 7) 1 0 (LSB) (LSB) 8 (MSB) n Reservation Descriptors (see next table) (LSB) Field descriptions: Generation: See SPC-3 r23. Additional Length: See SPC-3 r23. Reservation Descriptors: See SPC-3 r23. PERSISTENT RESERVE IN Reservation Descriptor The format for the reservation descriptor is shown below. There shall be a reservation descriptor for the persistent reservation, if any, present in the logical unit and a reservation descriptor for each element, if any, having a persistent reservation. Bit 7 6 Byte 0 (MSB) 1 2 (MSB) 5 4 3 2 Reservation Key Scope-Specific Address 1 0 (LSB) Chapter 3. Supported SCSI Commands 3-43

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Bit
7
6
5
4
3
2
1
0
Byte
n
-
7
(MSB)
Last
reservation
key
n
(LSB)
Field
descriptions:
Generation:
See
SPC-3
r23.
Additional
Length:
See
SPC-3
r23.
Reservation
Key
List:
See
SPC-3
r23.
PERSISTENT
RESERVE
IN
Parameter
Data
for
Read
Reservation
The
format
for
the
parameter
data
provided
in
response
to
a
PERSISTENT
RESERVE
IN
command
with
the
Read
Reservation
service
action
is
shown
below:
Bit
7
6
5
4
3
2
1
0
Byte
0
(MSB)
Generation
3
(LSB)
4
(MSB)
Additional
length
(
n
-
7)
7
(LSB)
8
(MSB)
Reservation
Descriptors
n
(see
next
table)
(LSB)
Field
descriptions:
Generation:
See
SPC-3
r23.
Additional
Length:
See
SPC-3
r23.
Reservation
Descriptors:
See
SPC-3
r23.
PERSISTENT
RESERVE
IN
Reservation
Descriptor
The
format
for
the
reservation
descriptor
is
shown
below.
There
shall
be
a
reservation
descriptor
for
the
persistent
reservation,
if
any,
present
in
the
logical
unit
and
a
reservation
descriptor
for
each
element,
if
any,
having
a
persistent
reservation.
Bit
7
6
5
4
3
2
1
0
Byte
0
(MSB)
Reservation
Key
1
(LSB)
2
(MSB)
Scope-Specific
Address
Chapter
3.
Supported
SCSI
Commands
3-43