User Manual

SCSI Commands Reference Manual, Rev. J 185
www.seagate.com Direct Access Block commands (SPC-5 and SBC-4)
3.34.3 One_command parameter data format
The REPORT SUPPORTED OPERATION CODES one_command parameter data format contains information about the CDB and a
usage map for bits in the CDB for the command specified by the REPORTING OPTIONS, REQUESTED OPERATION CODE, and
REQUESTED SERVICE ACTION fields in the REPORT SUPPORTED OPERATION CODES CDB.
CTDP (Command Timeout Descriptor Present) bit
0 A CTDP bit set to zero indicates that the command timeouts descriptor is not included in the parameter data.
1 A CTDP bit set to one indicates that the command timeouts descriptor is included in the parameter data.
Command Duration Limit Page (CDLP) field
The Command Duration Limit Page (CDLP) field (see table 147) indicates the mode page, if any, that specifies the command duration limit for
the command.
SUPPORT field
The SUPPORT field is defined in Table 156.
Table 155 One_command parameter data
Bit
Byte
7 6 5 4 3 2 1 0
0 Reserved
1 CTDP Reserved SUPPORT
2 (MSB)
CDB SIZE (n - 3)
3 (LSB)
4
CDB USAGE DATA. . .
n
n+1
Command timeouts descriptor, if any (see table 157). . .
n+12
Table 156 Support field
Support Description
000b
Data about the requested SCSI command is not currently available.
All data after byte 1 is not valid. A subsequent request for command support data may be successful.
001b
The device server does not support the requested command. All data after byte 1 is undefined.
010b
Reserved.
011b
The device server supports the requested command in conformance with a SCSI standard.
The parameter data format conforms to the definition in table 155.
100b
Reserved.
101b
The device server supports the requested command in a vendor specific manner.
The parameter data format conforms to the definition in table 155.
110b - 111b
Reserved.