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PERC 5/i RAID Card: Tips and Benchmarks - Page 404

post #4031 of 7188
How do you enable write caching? I have write-back set for the virtual drive with force WB with no battery enabled, but in the device manage I cannot enable write caching for the RAID array.

I get a message saying that it is not supported by the hardware. Does anyone have any ideas what I should do?
post #4032 of 7188
Quote:
Originally Posted by coolrunner84 View Post
How do you enable write caching? I have write-back set for the virtual drive with force WB with no battery enabled, but in the device manage I cannot enable write caching for the RAID array.

I get a message saying that it is not supported by the hardware. Does anyone have any ideas what I should do?
The card firmware makes it impossible to enable write caching from the OS level, because it would be counterproductive since the card itself has write caching built in. If you have WriteBack enabled, write caching is enabled on your card.
    
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post #4033 of 7188
I got my Perc5/i going. After I managed to weed out the first defective card, it was pretty easy to set up with this thread's help!

I'm getting some pretty crummy speeds on my card. Any advice?

Perc 5/i with 4 x 16gb SSD RAID0


5th 16gb SSD straight off my mainboard



edit:

Stripe size: 128kb
No Read Ahead
Write Back

I've got the card in a PCIe 4x but I can't imagine that's causing my issues
Edited by dullers - 2/10/10 at 4:30pm
post #4034 of 7188
turn on adaptive read ahead.
post #4035 of 7188
is it ok to use this card without the PCI bracket in a standard ATX case? Or do I need it for stability?
post #4036 of 7188
Quote:
Originally Posted by pookguy88 View Post
is it ok to use this card without the PCI bracket in a standard ATX case? Or do I need it for stability?
I would not use it without some form of bracket (home made, scavenged or otherwise) holding it in place.

You could have the card pulled out of the slot, or worse snap the card or break the slot off the motherboard if you run it bare.
post #4037 of 7188
I ran mine for about a week without a bracket while i was doing troubleshooting, cabling, etc. It did make it easy to remove/reseat it without having to deal with the PCI blank. I used some rubber pads underneath to help prop it up and provide stability.

-however-

i totally agree with the beast; I would not leave it in long-term without a bracket. it leans on the PCIe slot very hard. They go for like 9$ or so on ebay. I posted a link in another thread in the storage section. It's well worth it.
post #4038 of 7188
post #4039 of 7188
Quote:
Originally Posted by A_Man_Eating_Duck View Post
turn on adaptive read ahead.
i turned on adaptive read ahead and my speeds got worse =/

post #4040 of 7188
Just bought my 2nd Fujitsu 147Gb 15K SAS drive from a local auction site. Planning on running it in Raid 0 for the boot drive but will have to wait until my MB comes back from Asus. One drive only takes 30 odd secs to boot into win7 so cant wait to see what two raided will look like.
Is Raid 0 ok for boot drives or is redundancy something to consider?
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