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CDU-541 CD-ROM DRIVE SCSI INTERFACE MANUAL
The correlation of the error recovery parameter and the bit settings defined
in common command set document is given in Table 5-33.
The error recovery
parameter is defined in Tables 5-34. 5-35. 5-36 and 5-37.
If the error
recovery parameter is set to any other value the command will be terminated
~
with a CHECK CONDITION status.
The sense key will be set to ILLEGAL REQUEST
and the additional sense code set to ILLEGAL VALUE IN PARAMETER LIST.
The read retry count field specifies the number of times that the controller
will attempt its read recovery algorithm.
The default value is zero.
Table 5-34: Error Recovery Byte Bit Settings
-=====================================================-
value
I
Error Recovery
-----+-----+-----+-----+-----+-----+-----+-----+-----
I
I
I
TB
I
I
EER
I
PER
I
DTE
IOCR
-----+-----+-----+-----+-----+-----+-----+-----+-----
001
0
0
0
0
0
-----+-----+-----+-----+-----+-----+-----+-----+-----
01
I
0
0
0
0
1
-----+-----+-----+-----+-----+-----+-----+-----+-----
04
o
o ,
1
o
o
-----+-----+-----+-----+-----+-----+-----+-----+-----
• 05
I
0
0
1
0
1
1-----+-----+-----+-----+-----+-----+-----+-----+-----
06
I
_0
0
1
1
0
-----+-----+-----+-----+-----+-----+-----+-----+-----.
071
0
0
1
1
11
-----+-----+-----+-----+-----+-----+-----+-----+-----1
20
1
1
0
0
0
0
I
-----+-----+-----+-----+-----+-----+-----+-----+-----1
21
I
1
0
0
0
1
1
-----+-----+-----+-----+-----+-----+-----+-----+-----1
• 26
1
1
0
1
1
0
I
1-----+-----+-----+-----+-----+-----+-----+-----+-----1
I
27
I
1
0
1
1
1 :
=======================================================
A CIRC recovered data error is defined as a block for which the C2PO flag
was set. but on a subsequent read operations it was not set.
The number ofo
subsequent read operations is limited to the read retry count.
Layered error
correction is not used.
A CIRC unrecovered data error is defined as a block for which the C2PO flag
was set on all read operations up to the read retry count.
Only read retries
are used. layered error correction is not used.
An
L-EC recovered data error is defined as a block for which the C2PO flag
was asserted but the layered error correction was able to correct the block
within the read retry count.
An
L-EC uncorrectable data error is defined as a block which could not be
corrected by layered error correction within the read retry count.
The error recovery procedures in Tables 5-35 and 5-36 are applicable only to
CD-ROM mode one data.
If one of the these error recovery parameters is
5-66
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