User Manual

SCSI Commands Reference Manual, Rev. J 117
www.seagate.com Direct Access Block commands (SPC-5 and SBC-4)
3.13.3 READ RESERVATION service action
3.13.3.1 READ RESERVATION service action introduction
The READ RESERVATION service action requests that the device server return a parameter list containing a header and the
persistent reservation, if any, that is present in the device server.
For more information on READ RESERVATION see
SPC-5.
3.13.3.2 PERSISTENT RESERVE IN parameter data for READ RESERVATION
When no 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 79.
PRGENERATION field
The PRGENERATION field shall be as defined for the PERSISTENT RESERVE IN command with READ KEYS service action parameter data (see
3.13.2).
ADDITIONAL LENGTH field
The ADDITIONAL LENGTH field shall be set to zero, indicating that no persistent reservation is held.
Table 79 PERSISTENT RESERVE IN data for READ RESERVATION with no reservation held
Bit
Byte
7 6 5 4 3 2 1 0
0 (MSB)
PRGENERATION. . .
3 (LSB)
4 (MSB)
ADDITIONAL LENGTH (0000_0000h). . .
7 (LSB)