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4-27
(a) Allocation length: Byte 4
Specifies the storage area in bytes that tile initiator allocates for sense data If a 0 is set here, sense data is not
transferred, but this is not treated as an error. The target terminates tile DATA IN phase when it has
transferred either the bytes of sense data specified in this field or all of effective sense data.
4.4.4.2 Sense data: DATA EN phase (target → initiator)
The target creates sense data if its status is B'00001 ' (CHECK CONDITION) or if a BUS FREE error has occurred.
This scanner creates sense data when any of tile errors described later is encountered.
The sense data on this scanner is shown in tile following illustration.
7 6 5 4 3 2 1 0
Valid Error code
Segment number
FM EOM ILI (Reserved) Sense key
(MSB)
Information bytes
(LSB)
Additional sense length
(MSB)
Command-specific information byte
LSB
Additional sense code
Additional sense code qualifier
Field replaceable unit code
SKSV
Sense-key specific bytes
(a) Valid: Byte 0
Indicates whether or not the INFORMATION BYTES field is as specified by ANSI. This scanner
returns B'1' ("specified by ANSI").
(b) Error code: Byte 0
Differentiates between current error or deferred error. This scanner returns X'70' ("CURRENT ERROR").
(c) Segment number: Byte 1
This scanner does not support SEGMENT NUMBER. This scanner returns X'00'.
Byte 0
1
2
3
6
7
8
B
C
D
E
F
10
11