BIOS AP DVPro DVT10T2, User Manual

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BIOS AP Inc.
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19
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This parameter is only for DEBUG usage. Users should NOT alter this setting.
Parameter Function Memo
CACHE SIZE
64MB
1GB
「
Cache Buffer Error
」
will be shown if the selected cache
size not matched the installed cache memory
Default
1GB
64MB is only for test purpose and should not be used in normal operation.

Write Cache Mode setup
WRITE ALL
PENDING 0.1Sec
The controller needs more time than writing to single drive to generate parity while doing RAID-3/5/6
WRITE. Therefore Write Cache is enabled in such situation.
This parameter defines the timing of flushing cache contents into disks.
Parameter Function Memo
WRITE MODE
WAITING
Under this setting, the Write operation will not be acknowledged
as “Completed” till data is written into disks. This means no
caching is used during data write. The performance is slower
compared to
「
WRITE MODE PENDING
」
mode. READ speed is
not affected.
Write
Through
WRITE MODE
BUFFERD
Write command is acknowledged as “Completed” right after data
written into cache, and cached data starts to be moved into disks
at the same time.
Write Back
WRITE MODE
PENDING
0.1Sec
After caching the first host WRITE, the cache content will only be
flushed into disk if there is more than 0.1 sec host idle or cache
threshold is met. When doing sequential writes, cache will be
filled by multiple write command and data can be written once to
save total write time.
Default
WRITE MODE
PENDING
1 Sec
Similar to PENDING 0.1 sec, the wait interval is one second.

Verify Mode Setup
VERIFY WAIT
READ aft WRITE
Verify Mode allows you to setup the action for ATA WRITE VERIFY command.
“No Verify” will take
‘WRITE VERIFY’ command as a simple ‘WRITE’ without waiting verification to be completed.
Upon READ request after a WRITE command,
“NO READ aft WRITE”, means to use cached content to
respond a READ command after WRITE.
“READ aft WRITE” means cache data was discarded and
controller has to read data from disk
Parameter Function Memo
VERIFY The Write Verify command cannot be completed at the time data