Technical information

HGST Ultrastar C15K600 Hard Disk Drive Specification
239
011b
The command support data for the operation code and service action specified in the
Requested Operation Code field and Requested Service Action field will be returned in
the one_command parameter data format.
If:
a) the operation code specified by the Request Operation Code field specifies an
operation code for which the device server does not implement service actions, the
Requested Service Action field is set to 00h, and the command is supported; or
b) the operation code specified by the Requested Operation Code field specifies an
operation code for which the device server implements service actions and the value in
the Requested Service Action field is supported, then the command support data shall
indicate that the command is supported (i.e., the Support field is set to 011b or 101b).
Otherwise, the command support data shall indicate that the command is not supported
(i.e., the Support field is set to 001b).
100b-111b
Reserved
Requested Operation Code specifies the operation code of the command to be returned in the one_command
parameter data format.
Requested Service Action specifies the service action of the command to be returned in the one_command
parameter data format.
Allocation Length specifies the number of bytes that have been allocated for the returned parameter data. If the
length is not sufficient to contain all the parameter data, the first portion of the data shall be returned. The actual
length of the parameter data may be determined from the Additional Length field in the parameter data.