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C141-E124-01EN3 - 32
3.1.7 MODE SENSE (1A)
Bit
Byte
76543210
0X‘1A’
1LUN0DBD000
2 PC Page Code
300000000
4 Transfer Byte Length
5000000FlagLink
This command reports the values for each type of parameter related to the disk drive's physical
attributes, data format, timing for SCSI bus disconnect and reconnect processing, error recovery
procedures, etc., as well as the attributes of those parameters, to the INIT.
The data (MODE SENSE data) transferred to the INIT from the IDD by this command are
configured from a "Header," "Block Descriptor" and one or more "Page descriptors" which
describe each type of parameter, each of which will be described later in this item.
When "1" is specified in the "DBD (disable block descriptors)" bit of CDB byte 1, it indicates that
a "Block descriptor" is not included in the MODE SENSE data transferred to the INIT by this
command and the IDD transfers MODE SENSE data composed from the "Header" and the
specified "Page descriptor" only to INIT. When "0" is specified in this bit, the IDD transfers
MODE SENSE DATA composed of the "Header, " a single "Block descriptor" and the specified
"Page descriptor" to the INIT.
The "Page code" field in CDB byte 2 specifies the page code of the "Page descriptor" transferred
to the INIT by this command. The types of "Page descriptor" supported by the IDD and their page
codes and lengths are as shown below.
Page Code Page Descriptor Name CCS SCSI-2 SCSI-3
1 Read/Write Error Recovery Parameter 8 bytes 12 bytes 12 bytes
2 Disconnect/Reconnect Parameter 12 bytes 16 bytes 16 bytes
3 Format Parameter 24 bytes 24 bytes 24 bytes
4 Drive Parameter 20 bytes 24 bytes 24 bytes
7 Verify Error Recovery Parameter 12 bytes 12 bytes 12 bytes
8 Read Caching Parameter 20 bytes 20 bytes 20 bytes
A Control Mode Parameter 12 bytes 12 bytes 12 bytes
C Notch Parameter 24 bytes 24 bytes 24 bytes
1C Information of exceptions control parameter 12 bytes 12 bytes 12 bytes
21 Additional Error Recovery Parameter 4 bytes 4 bytes 4 bytes
3F All Page Descriptors Supported by the IDD 68 bytes 160 bytes 160 bytes