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M3099GX/GH OEM Manual 3-87
INTERFACE
The target shall terminate the command with CHECK
CONDITION status if the parameter list length results in the
truncation of any mode parameter header, mode parameter block
descriptor(omitted in this scanner), or mode page. The sense key
shall be set to ILLEGAL REQUEST, and the additional sense code
shall be set to PARAMETER LIST LENGTH ERROR.
The mode parameter list for the MODE SELECT and MODE
SENSE commands are defined in paragraph Mode Parameter.
MODE SENSE(6) Command
The MODE SENSE(6) command (Table 3.67) provides a means for
a target to report parameters to the initiator. It is a complementary
command to the MODE SELECT(6) command.
Table 3.67 MODE SENSE(6) Command
Bit
Byte
0
1
2
3
4
5
7 6 5 3 2 1 0
Operation Code (1Ah)
Reserved
Allocation Length
Control
Logical Unit Number
Reserved
4
DBD Reserved
PC Page Code
DBD (disable block descriptors): 0b
This bit of zero indicates that the target may return zero or more
block descriptors in the returned MODE SENSE data (see ANSI
SCSI-2 8.3.3), at the target’s discretion. A DBD bit of one specifies
that the target shall not return any block descriptors in the returned
MODE SENSE data. The DBD bit must be 0b in this scanner.
PC (Page Control): 00h(current value)
This field defines the type of mode parameters values to be returned
in the mode pages. The page control field is defined in ANSI SCSI-2
Table 55, 8.2.10.1 to 8.2.10.4..
#03.pm5 98.2.22, 1:33 PM87