User Manual

SCSI Commands Reference Manual, Rev. J 181
www.seagate.com Direct Access Block commands (SPC-5 and SBC-4)
3.34 REPORT SUPPORTED OPERATION CODES command
3.34.1 REPORT SUPPORTED OPERATION CODES command overview
The REPORT SUPPORTED OPERATION CODES command (see table 150) requests the device server to return information on commands the
addressed logical unit supports. This command uses the MAINTENANCE IN CDB format (see SPC-5). An application client may request a list of
all operation codes and service actions supported by the logical unit or the command support data for a specific command.a.
OPERATION CODE field
The OPERATION CODE field contains the operation code of a command supported by the logical unit and shall be set to the value defined in
table 150.
SERVICE ACTION field
The SERVICE ACTION field is defined in Clause 2.2.2 and shall be set as shown in table 150.
RCTD (Return Command Timeouts Descriptor) bit
0 A RCTD bit set to zero specifies that the command timeouts descriptor shall not be included in any parameter data returned.
1 A RCTD bit set to one specifies that the command timeouts descriptor shall be included in each command descriptor that is returned or
in the one-command parameter that is returned.
Table 150 REPORT SUPPORTED OPERATION CODES command
Bit
Byte
7 6 5 4 3 2 1 0
0 OPERATION CODE (A3h)
1 Reserved SERVICE ACTION (0Ch)
2 RCTD Reserved REPORTING OPTIONS
3 REQUESTED OPERATION CODE
4 (MSB)
REQUESTED SERVICE ACTION
5 (LSB)
6 (MSB)
ALLOCATION LENGTH. . .
9 (LSB)
10 Reserved
11 CONTROL