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Volume write-back cache ??

post #1 of 4
Thread Starter 
I have 4 Seagate 500gb 7200.12 ST3500418as CC46fw running as Raid 0. In Intel Matrix Console, should I enable or disable " volume write-back cache "? I have heard this should only be enabled for RAid 5. Thanks in advance for any help or info.


This is with write-back cache disabled:
3-26-20115-24-37PM.jpg


and with write-back cache enabled:
3-26-20115-29-29PM.jpg
Looks like with it enabled the max speeds are higher and fluctuate but average speeds is slower.
Edited by teohenwhy - 3/26/11 at 6:04pm
post #2 of 4
Thread Starter 
50 views and no one knows?
post #3 of 4
Interesting...

Write-back cache is designed to speed up disk writes. I can't think of why this is hindering your read speeds. Can you test your write speeds? You could do a simple copy test if you can't use HDTune.
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post #4 of 4
Your second test looks like there's more background processes running while you're doing the test. Try doing the tests again.

As for write-back cache, you can enable it, but if you do, there is a risk that the data may not actually be written to disk if you have a sudden power failure or something like that. Since you're doing motherboard RAID, if you value your data, don't enable write-back cache unless you have the computer on a UPS.
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