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218 Fibre Channel Interface Manual, Rev. D
12.13.2 Error Recovery page (01h)
The disc drive Error Recovery page implementation is defined in Table 147. This table summarizes the function
and default for each byte/bit.
See individual drive’s Product Manual, Volume 1, section showing changeable values. A value of zero (0)
means this bit function is not directly changeable by an initiator; a value of 1 means the bit function is directly
changeable by an initiator (see Mode Select command).
Field definitions (listed alphabetically)
ARRE (Automatic Read Reallocation of defective data blocks Enabled)
1 Allows the disc drive to automatically reallocate bad blocks detected during read operations. Automatic reallocation
is performed only if the drive successfully recovers the data and is able to place it in the reallocated block.
0 The disc drive will not perform automatic reallocation but will create Check Condition status with sense key of
Medium Error instead.
AWRE (Automatic Write Reallocation of defective data blocks Enabled)
1 Allows the disc drive to automatically reallocate bad blocks detected during write operations. The drive performs the
automatic write reallocation only if the drive has the valid data (e.g., original data in the buffer or recovered from the
medium). The valid data is placed in the reallocated block. This function doesn’t apply to the Format Unit command.
0 The disc drive will not perform automatic reallocation but will create Check Condition status with sense key of
Medium Error instead.
Table 147: Error Recovery page (01h)
Bit
Byte
76543210
Page descriptor header
010000001
PS Page Code (01h)
1
Page Length (0Ah bytes)
Error recovery parameters
2
Default
AWRE ARRE TB RC EER PER DTE DCR
3
Default
Read Retry Count
4
Default
Correction Span (bits)
5
Default
Head Offset Count
6
Default
Data Strobe Offset Count
7
Default
Reserved
8
Default
Write Retry Count
9
Default
Reserved
10 (MSB)
Recovery Time Limit
11 (LSB)
Table
number
147
147