Quantum Quantum Atlas 10K II 9.2/18.4/36.7/73.4 GB, Product Manual

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SCSI Description
5–132 Quantum Atlas 10K II Ultra160/m SCSI Hard Disk Drives
PERSISTENT RESERVATION OUT Command (5Eh) (continued)
Table 5–60 Persistent Reservation Type Codes and Their Meanings (continued)
Code Name Description
6h Exclusive
Registrants Only
READS: Exclusive; any command from an initiator that has not previously
performed a Register service action with the device server that
attempts a transfer from the disk results in a reservation conflict.
WRITES: Exclusive; any command from an initiator that has not previously
performed a Register service action with the device server that
attempts a transfer to the disk results in a reservation conflict
ADDITIONAL RESERVATIONS: Allowed; any initiator may reserve the
logical unit, extents, or elements as long as
the persistent reservations to not conflict
with any reservations already known to the
device server.
7h - Fh Reserved N/A
The PERSISTENT RESERVATION OUT command requires a parameter list, illustrated
in the following figure and defined in the following table. Each of the fields of the
parameter list are sent for every PERSISTENT RESERVATION OUT command, even if
the field is not required for the specific Service action and/or Scope values.
Bit
Byte
7 6 5 4 3 2 1 0
0 – 7
(MSB)
Reservation Key
(LSB)
8 – 15
(MSB)
Service Action Reservation Key
(LSB)
16 – 19
(MSB)
Scope-Specific Address
(LSB)
20 Reserved APTPL
21 Reserved
22 – 23
(MSB)
Extent Length
(LSB)
Figure 5–55 PERSISTENT RESERVATION OUT Parameter List — Data Format