Dell PowerVault TL4000 SCSI Reference Guide - Page 81
Report, Supported, Operation, Codes
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REPORT SUPPORTED OPERATION CODES (A3h) The REPORT SUPPORTED OPERATION CODES command requests information on commands the addressed logical unit supports. An application client may request a list of all operation codes and service actions supported by the media changer. Bit 7 Byte 0 1 2 3 4 (MSB) 5 6 (MSB) 7 8 9 10 11 6 5 4 3 2 1 0 LUN Operation Code (A3) Service Action (0Ch) Reserved Reporting Options Requested Operation Code Requested Service Action (LSB) Allocation Length Reserved Control (LSB) Field descriptions: Reporting Options : The Reporting Options field specifies the information to be returned in the parameter data. Reporting Option 000b 001b 010b 011b Description A list of all operation codes and service actions supported by the logical unit shall be returned in the all_commands parameter data format. The Requested Operation Code Cdb field and Requested Service Action Cdb field shall be ignored. The command support data for the operation code specified in the Requested Operation Code field shall be returned in the one_command parameter data format. The Requested Service Action Cdb field shall be ignored. If the Requested Operation Code field specifies an operation code that has service actions, then the command shall be terminated with CHECK CONDITION status, with the sense key set to ILLEGAL REQUEST, and the additional sense code set to INVALID FIELD IN CDB. The command support data for the operation code and service action specified in the Requested Operation Code Cdb field and Requested Service Action Cdb field shall be returned in the one_command parameter data format. If the Requested Operation Code Cdb field specifies an operation code that does not have service actions, then the command shall be terminated with CHECK CONDITION status, with the sense key set to ILLEGAL REQUEST, and the additional sense code set to INVALID FIELD IN CDB. Reserved Requested Operation Code: The Requested Operation Code field specifies the operation code of the command to be returned in the one_command parameter data format. Requested Service Action: The Requested Service Action field specifies the service action of the command to be returned in the one_command parameter data format. Chapter 3. Supported SCSI Commands 3-67