HP C2488A Technical Reference Manual page 125

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