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5-40 Maxtor Atlas 10K V
Table 5-61 Read-Write Error Recovery Page - Field Descriptions
Field
Default
Value
Description
PS 1
Parameters Savable. This bit is only used with the MODE SENSE command. A returned val-
ue of 1 indicates that the target is capable of saving the page in a non-volatile, vendor-specific
location. The bit is reserved with the MODE SELECT command.
AWRE 1
Automatic Write Reallocation Enable. When the value is 1, it causes the drive to automati-
cally reallocate bad sectors encountered during a write operation. If it succeeds in replacing
the bad sector, the drive adds the revectored sector’s Logical Block Number to the Grown
Defect List.
When AWRE is 0, the drive does not automatically reallocate bad sectors encountered during
a write operation.
ARRE 1
Automatic Read Reallocation Enable. When the value is 1, it causes the drive to automatical-
ly reallocate bad sectors encountered during a read operation. If it succeeds in replacing the
bad sector, the drive adds the revectored sector’s Logical Block Number to the Grown Defect
List. Reallocation is done only when the drive is able to recover the sector’s data unless the
Reallocate Uncorrected Errors bit of the Maxtor (Vendor) Special Function Control Page is
set.
When ARRE is 0, the drive does not automatically reallocate bad sectors encountered during
a read operation. See also Maxtor-Unique Page 39h (RUEE).
TB 0
Transfer Block. When the value is 1, the drive sends best-guess information to the initiator
when it encounters a defective sector whose data cannot be fully recovered.
When the value is 0, data that cannot be fully recovered is not returned to the initiator.
RC 0
Read Continuous. When the value is 0, the drive attempts error recovery when it encounters
an error. When the value is 1, the drive suppresses error recovery. The drive ignores any val-
ue placed in this field.
EER 0 Enable Early Recovery. Not supported by the drive.
PER 0
Post Error Recovery. When the value is 0, the drive returns a GOOD status in cases where
error recovery is invoked and successful.
When the value is 1, the drive returns a CHECK CONDITION status for recovered errors,
sets the sense key to RECOVERED ERROR, and posts the appropriate additional sense key.
DTE 0 Disable Transfer on Error. Not supported by the drive.
DCR 0
Disable Correction. When the value is 0, ECC correction is applied as a means of recovering
erred data. On write operations, a valid ECC is written to each data sector regardless of the
value in the DCR bit.
When the value is 1, Firmware ECC correction only is disabled (but not retries or reads), and
ECC errors greater than hardware correctable cannot be corrected.
Read Retry
Count
4 Specifies the number of retries attempted for a failed read operation.
Correction
Span
240
Specifies the maximum number of bits in a data sector that the drive is allowed to correct. A
value less than the default value can cause an otherwise correctable error to be reported as
uncorrectable. If the initiator specifies a value larger than the default value, the drive auto-
matically rounds down the number to the default value. A value of 0 causes the drive to use
the default value. The drive ignores any value placed in this field.
Head Offset
Count
0 Not supported by the drive.
Data Strobe
Offset Count
0 Not supported by the drive.
Write Retry
Count
8 Specifies the number of retries attempted for a failed write operation.