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Sense Data
The extension sense data format is used for the sense data
created when an error occurs. This format is described below.
Bit
Byte
7 6 5 4 3 2 1 0
0 Valid Error class (7) Error code (0)
1 Segment data number (0)
2 File mark EOM ILI Reserved Sense keys
3 Information byte (MSB)
4 Information byte
5 Information byte
6 Information byte (LSB)
7 Additional sense byte (0)
Following is a description of the individual bits and bytes.
Valid:
When set to 0, this bit indicates that the data in the data byte is
invalid. When set to 1, the data is valid.
ILI:
This is the illegal length bit. When set to 1, this bit indicates
that the transfer length or assigned length specified with a
command is not the same as the actual data length required
by the scanner.
Interface Specifications A-17