Persistent Reserve In
96122 • Revision: F Chapter 6 SCSI Commands 169
Persistent Reserve In
The Persistent Reserve In (5Eh) and Persistent Reserve Out (5Fh) commands
resolve contention among multiple initiators and multiple-port targets within the
system.
The library uses the Persistent Reserve In command to identify which initiators are
holding conflicting or invalid persistent reservations.
TABLE 6-58 Persistent Reserve In Command
Byte
Bit
76543210
0 Operation Code (5Eh)
1Ignored Service Action
2 Reserved (00h)
3 Reserved (00h)
4 Reserved (00h)
5 Reserved (00h)
6 Reserved (00h)
7
to
8
(MSB)
Allocation Length
(LSB)
9Control (00h)
Persistent Reserve In Command Descriptions:
Service Action This field defines the type of request that is being made to the initiator.
Valid values are 00h, 01h, and 02h.
■ 00h = Returns Read Keys Data (see TABLE 6-59)
■ 01h = Returns Read Reservations Data (see TABLE 6-60 and
TABLE 6-61)
■ 02h = Returns Report Capabilities Data (see TABLE 6-62)
Values 03h through 1Fh are reserved.
Allocation Length This field 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 parameter list will be incomplete. However, a partial list is not an error.
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