Quantum DLT 8000 Product Manual page 175

INQUIRY Command (12h) (continued)
Table 5–13 Command Support Data Page — Field Descriptions
Field
Support
ISO-Version
ECMA-Version
ANSI-Approved
Version
CDB Size
CDB Usage Data
Description
The value of the Support field describes the type of support that the
tape drive provides for Command Support Data.
Value Description
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
Must be 0.
Must be 0.
Minimum operating definition for supported command.
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.
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.
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.
Quantum DLT 8000 Tape System
SCSI Commands
NOTE
5-31