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Support The value of the Support field describes the type of support that
the tape drive provides for Command Support Data.
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000b Data about the requested SCSI operation code is not
currently available. In this case, all data after Byte 1 is
undefined.
001b The device does not support the SCSI operation code
requested. In this case, all data after Byte 1 is
undefined
010b Reserved
011b The device supports the SCSI operation code in
conformance with the SCSI standard.
100b Vendor-Specific
101b The device supports the SCSI operation code, but in a
vendor-specific manner
110b Vendor-Specific
111b Reserved
ISO-Version Must be 0.
ECMA-Version Must be 0.
ANSI-Approved Minimum operating definition for supported command.
Version
CDB Size This field contains the number of bytes in the CDB for the
Operation Code being requested and the size of the CDB
Usage Data in the data that is returned in response to the
INQUIRY.
CDB Usage Data This field contains information about the CDB for the Operation
Code being queried. Note that the first byte of the CDB Usage
Data contains the OpCode for the operation specified. All of the
other bytes of the CDB Usage Data contain a map for bits in the
CDB of the OpCode specified.
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The bits in the map have a 1-to-1 correspondence to the CDB for the
OpCode being queried. That is, if the device senses a bit as the entire
field or as part of the field of the operation, the map in CDB Usage Data
contains a 1 in the corresponding bit position. If the device ignores a bit or
declares a bit as “reserved” in the CDB for the OpCode being queried, the
map has a 0 in that corresponding bit position.