Access
Log
Data Error Log Entry
This 6-byte entry is used
to
convey
data
error information about a specific
data
block.
Data
Error
Log
Entry
Header
Format
Bit
Byte
7
I
6
I
5
J
4
I
3
J
2
I
1
I
0
00
Log Entr)l .Type =
02H'
01 Log
Entry
Length = 06H
Data
Error
Log
Entry
Data
Format
Byte
7
I
6
I
5
I
4
I
3
I
2
I
1
I
0
02-05
(MSB=02) Block AddrellS
(LSB=05)
06
Data
Error
Code
07
Occurrence
Count
Block Address. This field contains the block address
of
the
data
block
that
encountered
multiple read retries during one or more
data
error recovery
attempts.
If
the
PHYS
bit
in
the
CDB is set
to
zero (0),
the
field contains
the
logical block address.
If
PHYS is set
to
one (1),
the
field contains
the
physical block address in the following format:
• Byte
2:
Cylinder Address (MSB)
•
Byte
3:
Cylinder Address (LSB)
•
Byte
4:
Head Address
• Byte
5:
Sector Address
Data
Error
Code. This byte is bit-significant, and multiple errors
at
the
same location will
have their respective bits merged into
the
reported byte
as
follows:
• Bit
7:
Unclassifiable error
• Bit
6:
Error occurred in header field
• Bit
5:
Error occurred in
data
field
• Bit
4:
Unrecoverable error
• Bit 3: Error recovered with ECC
• Bit
2:
Error recovered with retries
• Bit
1:
Write fault
• Bit
0:
Reserved
Occurrence Count. This field is incremented each time the specified block is un correctable
or
requires multiple read retries in a given transaction. This field is incremented only once for
each
data
recovery.
DRAFT
Vendor
Unique
Command
Descriptions
8·5
1/18/93 09:58
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