Sony SDX-800V/R 사용자 설명서
PERSISTENT RESERVE IN
6.Command Specification
SONY AIT-3Ex drive SDX-800V series Ver.1.1
6-59
6.9. PERSISTENT RESERVE IN 5Eh
Bit
Byte
7 6 5 4 3 2 1 0
0
Operation Code (5Eh)
1
Logical Unit Number
Reserved
SERVICE ACTION
2
Reserved
3
Reserved
4
Reserved
5
Reserved
6
Reserved
7
(MSB) Allocation
Length
8
(LSB)
9
Unused (00b)
Reserved
Flag
Link
The PERSISTENT RESERV IN command is used to obtain about persistent reservations and reservation keys that
are active within a drive.
are active within a drive.
The actual length of the PERSISTENT RESERVE IN parameter data is available in a parameter data field.
SERVICE ACTION: The service action codes are defined:
Table 6-54: PERSISTENT RESERVATION IN Service action codes
Code Name
Description
00h
READ KEYS
Reads all registered Reservation Keys
01h
READ RESERVATION
Reads the current persistent reservations
02h-1fh Reserved
Reserved
READ KEYS – The READ KEYS service action that the drive return a parameter list containing a header and a list of
each current registered initiator’s reservation key. If multiple initiators have registered with the same key, then that
key value shall be listed multiple times, once for each such registration.
READ RESERVATIONS – The READ RESERVATIONS service action requests that the drive return a parameter
list containing a header and the persistent reservation(s), if any, that is present in the drive. Multiple persistent
list containing a header and the persistent reservation(s), if any, that is present in the drive. Multiple persistent
reservations may be returned only if element reservations are present.
Allocation Length: The Allocation Length field indicates how much space has been reserved for the returned
parameter list. If length is not sufficient to contain the entire parameter list, the first portion of the list shall be
returned. This shall not be considered an error. If the remainder of the list is required, the application client should
send a new PERSISTENT RESERV IN command with a Allocation Length field large enough to contain the entire
list.
list.
The returned the parameter data provided in response to a PERSISTENT RESERVE IN command with the READ
KEYS service action has the following format:
Table 6-55: PERSISTENT RESERVATION IN parameter data for READ KEYS
Bit
Byte
7 6 5 4 3 2 1 0
0
(MSB)
GENERATION
3
(LSB)
4
(MSB)
Additional Length
7
(LSB)
Reservation Key list
8
(MSB)
First reservation key
15
(LSB)
n-7
(MSB)
Last reservation key
n
(LSB)