Hitachi ULTRASTAR 15K450 HUS154530VLF400 - Manual (Page 216)

Hitachi Ultrastar 15K450 (FC-AL) Hard Disk Drive Specification
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19.12.3 Parameter Data for Read Reservations
Table 166: PERSISTENT RESERVE IN, parameter data for Read Reservations
The Generation field shall be as defined for the Persistent Reserve In Read Keys parameter data. The Additional Length field
contains a count of the number of bytes to follow in the Reservation Descriptor(s).
If the Allocation length specified by the PERSISTENT RESERVE IN command is not sufficient to contain the entire param-
eter list, then only the bytes from 0 to the maximum allowed allocation length shall be sent to the Initiator. The remaining
bytes shall be truncated, although the Additional Length field shall still contain the actual number of bytes of the Reservation
Descriptor(s) and shall not be affected by the truncation. This shall not be considered an error.
The format of the Reservation Descriptors is defined in the Persistent Reserve In Reservation Descriptor table. There shall
be a Reservation Descriptor for the persistent reservation, if any, present in the Target having a persistent reservation.
Table 167: PERSISTENT RESERVE IN, Read Reservation Descriptor
.The Scope of each persistent reservation created by a PERSISTENT RESERVE OUT command will be returned. See the
PERSISTENT RESERVE OUT command section for details.
Byte
Bit
7 6 5 4 3 2 1 0
0-3
(MSB)
Generation
(LSB)
4-7
(MSB)
Additional length (n-7)
(LSB)
8-n
(MSB)
Reservation descriptors
(LSB)
Byte
Bit
7 6 5 4 3 2 1 0
0-7
(MSB)
Reservation key
(LSB)
8-11
(MSB)
Scope-specific address
(LSB)
12 Reserved
13 Scope=0 Type
14-15
(MSB)
Extent Length=0
(LSB)