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4.1.6
MODE SENSE (1A)
Bit
7
Byte
0
1
0
2
PC
3
0
4
5
0
This command reports the values for each type of parameter related to the disk drive's physical
attributes, data format, timing for FC interface Loop OPEN/CLOSE 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
1
2
3
4
7
8
A
C
21
3F
19
1C
6
5
4
0
0
0
0
0
0
Transfer Byte Length
0
0
0
Page Descriptor Name
Read/Write Error Recovery Parameter
Disconnect/Reconnect Parameter
Format Parameter
Drive Parameter
Verify Error Recovery Parameter
Read Caching Parameter
Control Mode Parameter
Notch Parameter
Additional Error Recovery Parameter
All Page Descriptors Supported by the IDD
Fibre Channel Control Parameter
Information Exception Control Parameter
C141-E054-02EN
3
2
X'1A'
DBD
0
Page Code
0
0
0
0
1
0
0
0
0
0
0
0
SCSI-2
12 bytes
16 bytes
24 bytes
24 bytes
12 bytes
20 bytes
12 bytes
24 bytes
4 bytes
168 bytes
8 bytes
12 bytes
4 - 63
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