Command Support Data Page-Data Format; Command Support Data Page-Field Descriptions - Maxtor ATLAS 10K III Product Manual

An application client can request command support data by setting the CmdDt bit of
the INQUIRY command to 1, and specifying the SCSI operation code of the
Command Descriptor Block (CDB) for which it wants information.
Format of the command support data and definitions of the fields follow in Table 5-
39, Table 5-40, and Table 5-41.
T a b l e 5 - 3 9 Command Support Data Page-Data Format
B i t
0 Peripheral Qualifier
1
2 ISO Version
3 – 4
5
(MSB)
6 – m
T a b l e 5 - 4 0 Command Support Data Page-Field Descriptions
( K G N F
The value of the Support field describes the type of support that the disk
Support
drive provides for Command Support Data.
ISO-Version
ECMA-Version
ANSI-Approved
Minimum operating definition for supported command.
Version
This field contains the number of bytes in the CDB for the Operation Code
CDB Size
being requested and the size of the CDB Usage Data in the data that is
returned in response to the INQUIRY.
= 0
Reserved
ECMA Version
Reserved
CDB Size (m – 5)
CDB Usage Data
Value
000b
001b
010b
011b
100b
101b
110b
111b
Peripheral Device Type = 0
(Direct Access Device)
Support
ANSI-Approved Version
& G U E T K R V K Q P
Description
Data about the requested SCSI operation
code is not currently available. In this
case, all data after Byte 1 is undefined.
The device does not support the SCSI
operation code requested. In this case,
all data after Byte 1 is undefined
Reserved
The device supports the SCSI operation
code in conformance with the SCSI stan-
dard.
Vendor-Specific
The device supports the SCSI operation
code, but in a vendor-specific manner
Vendor-Specific
Reserved
Must be 0.
Must be 0.
Maxtor Atlas 10K III
SCSI Description
(LSB)
5-33