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SDLT 600 SCSI Interface Guide Chapter 4: SCSI Commands
81-81200-02 REV A01 January 2005 4-209
Table 4-122. REPORT SUPPORTED OPERATION CODES Command Descriptor Block — Field
Descriptions
Field Description
Service
Action
A service action of 0Ch identifies this as the REPORT SUPPORTED OPERATION
CODES command.
Reporting
Options
Specifies the type of information to be returned in the parameter data. All values other than
those listed are reserved.
Value Description
000b The drive returns a list of all supported operation codes and service actions in the
all_commands parameter data format. The drive ignores any values in the
Requested Operation Code and Requested Service Action fields. See
“All_commands Parameter Data Format” on page 4-210 for more information.
001b The drive returns the command support data in the one_command parameter data
format for the operation code specified in the Requested Operation Code field.
The drive ignores any value in the Requested Service Action field. If the
Requested Operation Code field specifies an operation code that has service
actions, the drive returns CHECK CONDITION status, Sense Key set to
ILLEGAL REQUEST, and Addition Sense Code set to INVALID FIELD IN
CDB. See “One_command Parameter Data Format” on page 4-212 for more
information.
010b The drive returns the command support data in the one_command parameter data
format for the operation code and service action specified in the Requested
Operation Code and Requested Service Action fields. If the Requested Operation
Code field specifies an operation code that does not have service actions, the
drive returns CHECK CONDITION status, Sense Key set to ILLEGAL
REQUEST, and Addition Sense Code set to INVALID FIELD IN CDB. See
“One_command Parameter Data Format” on page 4-212 for more information.
Requested
Operation
Code
Specifies the operation code of the command to be returned in the one_command
parameter data format. See “One_command Parameter Data Format” on page 4-212 for
more information.
Requested
Service
Action
Specifies the service action of the command to be returned in the one_command parameter
data format. See “One_command Parameter Data Format” on page 4-212 for more
information.
Allocation
Length
Specifies the number of bytes allocated for the returned parameter data. If the Allocation
Length value is not large enough to hold all of the parameter data, the drive truncates the
data it returns. This is not considered an error. The actual length of the parameter data is
available in the Additional Length field in the parameter data. If the remainder of the
parameter data is required, the application client must send a new REPORT SUPPORTED
OPERATION CODES command with an Allocation Length field value large enough to
hold all of the data.
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