Persistent Reserve In (5E); Service Action; Table 94. Persistent Reserve In (5E); Table 95. Persistent Reserve In, Service Action Codes - Hitachi HUS151473VL3800 - Ultrastar 73.4 GB Hard Drive Specifications

17.12 PERSISTENT RESERVE IN (5E)

Table 94: Persistent Reserve In (5E)
Byte
7
0
1 Reserved = 0
2-6
(MSB)
7-8
9 VU = 0
When a drive receives a PERSISTENT RESERVE IN command and RESERVE (6) or RESERVE (10) logical unit is active,
the command is rejected with a Reservation Conflict status.
PERSISTENT RESERVE IN command does not conflict with a reservation established by the PERSISTENT RESERVE OUT
command.
The PERSISTENT RESERVE IN command is used to obtain information about persistent reservations and reservation keys
that are present within a target. This command is used in conjunction with the PERSISTENT RESERVE OUT command.
The actual length of the PERSISTENT RESERVE IN parameter data is available in the parameter data. The Allocation Length
field in the CDB indicates how much space has been reserved for the returned parameter list.
If the 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 Initiator should send a new PERSISTENT RESERVE IN com-
mand with an Allocation Length field large enough to contain the entire list.

17.12.1 Service Action

The following service action codes are implemented. If a reserved service action code is specified, the drive returns a Check
Condition status. The sense key is set to Illegal Request and the additional sense data is set to Invalid Field in CDB.
Table 95: PERSISTENT RESERVE IN, Service Action Codes
Code Name
00h Read Keys
01h Read Reservations
02h-1Fh Reserved
Hitachi Confidential
6 5 4
Command Code = 5Eh
Reserved = 0
Allocation Length
Reserved = 0
Reads all registered Reservation Keys
Reads all current persistent reservations
Reserved
Hitachi Ultrastar 15K147 SCSI Hard Disk Drive Specification
Bit
3 2
Service Action
FLAG
Descriptions
143
1 0
(LSB)
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