A question about REPORT SUPPORTED OPERATION CODES behavior

Gerry Houlder gerry.houlder at seagate.com
Fri Aug 2 08:25:17 PDT 2013


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Hi,
The SUPPORT field in the One_command parameter data has one value (101b)
described as "the device server supports the requested command in a vendor
specific manner". Its not clear what the intended use is.
Should this value be returned if the device supports one of the vendor
specific operation codes? Since the operation code is already defined as
vendor specific, isn't this redundant? It is already expected to be vendor
specific, so this is not unusual.
Should this value be returned for obsolete commands that are supported?
Or should use of this support code be limited to standard commands in which
a reserved field is used in a vendor specific manner?



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