Caching Page (08H) - Maxtor Atlas 10K V Product Manual

Table 5-65
Default
Field
Value
PS 0
EER 0
PER 0
DTE 0
DCR 0
Verify
4
Retry Count
Verify
Correction 240
Span
Verify
Recovery 0
Time Limit
5.12.9

Caching Page (08h)

The Caching Page controls the drive's cache management policy. The data format and
field descriptions are described in Table 5-66 and Table 5-67 respectively.
Bit
Byte
0
1
2
3
4 – 5
6 – 7
8 – 9
10 – 11
12
13
14 – 15
16
17 – 19
5-44 Maxtor Atlas 10K V
Verify Error Recovery Page-Field Descriptions (Page 7)
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.
Enable Early Recovery. Not supported by the drive.
Post Error Recovery. When the value is 1, the drive returns CHECK CONDITION status for
recovered errors, sets the sense key to RECOVERED ERROR, and posts the appropriate ad-
ditional sense code.
When set to the default value of 0, it causes the drive to return GOOD status in cases where
error recovery is invoked and is successful. The only recoverable error that can occur during
a VERIFY operation is a failed read that succeeds after retries.
Disable Transfer on Error. Not supported by the drive.
Disable Correction. When the value is 1, it disables ECC Firmware only (but not retries) on
the READ portion of a VERIFY operation. When set to the default value of 0, the ECC cor-
rection is always applied as a means of recovering erred data.
The Verify Retry Count specifies the number of retries that are attempted per sector on a
failed READ portion of a VERIFY operation.
The Verify Correction Span specifies the maximum number of bits in a 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 80, the drive
rounds down to 80 without reporting the change. A value of 0 causes the drive to use its de-
fault value. The drive ignores any value in this field.
The Verify Recovery Time Limit specifies (in milliseconds) the maximum time that a retry
is attempted on a failed sector during the read portion of a verify operation. The default value
of 0 indicates that there is no time limit. The minimum permissible is 100 milliseconds.
Table 5-66
7 6 5
PS Rsvd
IC ABPF CAP
Demand Read Retention Priority
FSW LBCSS DRA
Description
Caching Page-(Page 8)
4 3
Page Code (08h)
Page Length (12h)
DISC Size
Demand Write Retention Priority
Disable Pre-Fetch Transfer Length
Minimum Pre-Fetch
Maximum Pre-Fetch
Maximum Pre-Fetch Ceiling
VS VS
Number of Cache Segments
Cache Segment Size
Reserved
Non-Cache Segment Size
2 1 0
WCE MF RCD
Reserved