Datasheet

4.1 Control/Sense Commands

C141-C008 4-121

(3) PERSISTENT RESERVE IN parameter data for READ RESERVATIONS

The format for the parameter data provided in response to a PERSISTENT

RESERVE IN command with the READ RESERVATIONS service action is

shown in Table 4.84.

Table 4.84 PERSISTENT RESERVE IN parameter data for READ RESERVATIONS

Bit

Byte

7 6 5 4 3 2 1 0

0 (MSB)

Generation

3 (LSB)

4 (MSB)

Additional Length (n-7)

7 (LSB)

(MSB)

Reservation descriptor(s)

(see below)

(LSB)

The "Generation" field shall be as defined for the PERSISTENT RESERVE IN

READ KEYS parameter data (see 4.1.17 (2) ).

The "Additional Length" field contains a count of the number of bytes to follow

in Reservation descriptor(s). If the allocation length specified by the

PERSISTENT RESERVE IN command is not sufficient to contain the entire

parameter list, then only first portion of the list (byte 0 to the allocation length)

shall be sent to the application client. The incremental remaining bytes shall be

truncated, although the "Additional Length" field shall still contain the actual

number of bytes of 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 Table 4.85. There shall be

a Reservation descriptor for the persistent reservation, if any, present in the

logical unit and a Reservation descriptor for each element, if any, having a

persistent reservation.

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