User Manual

SCSI Commands Reference Manual, Rev. J 118

www.seagate.com Direct Access Block commands (SPC-5 and SBC-4)

When a persistent reservation is held, the format for the parameter data provided in response to a PERSISTENT RESERVE IN

command with the READ RESERVATION service action is shown in table 80.

PRGENERATION field

The PRGENERATION field shall be as defined for the PERSISTENT RESERVE IN command with READ KEYS service action parameter data.

ADDITIONAL LENGTH field

The ADDITIONAL LENGTH field contains a count of the number of bytes to follow and shall be set to 16. The relationship between the ADDI-

TIONAL LENGTH field and the CDB ALLOCATION LENGTH field is defined in 2.2.6.

RESERVATION KEY field

The RESERVATION KEY field shall contain the reservation key under which the persistent reservation is held (see SPC-5).

SCOPE field

The SCOPE field shall be set to LU_SCOPE (see 3.13.3.3).

TYPE field

The TYPE field shall contain the persistent reservation type (see 3.13.3.4) specified in the PERSISTENT RESERVE OUT command that created the

persistent reservation.

The obsolete fields in bytes 16 through 19, byte 22, and byte 23 were defined in a previous standard.

Table 80 PERSISTENT RESERVE IN parameter data for READ RESERVATION with reservation

Bit

Byte

7 6 5 4 3 2 1 0

0 (MSB)

PRGENERATION. . .

3 (LSB)

4 (MSB)

ADDITIONAL LENGTH (0000-0010h). . .

7 (LSB)

8 (MSB)

RESERVATION KEY. . .

15 (LSB)

Obsolete. . .

20 Reserved

21 SCOPE TYPE

Obsolete