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Raid 0 isues

post #1 of 12
Thread Starter 
why are my read/ writes so low using 2x 60gb corsair force gt's, i was expecting somewhere closer to the 1000 mb/s range for read/write. i have all the proper raid drivers installed.
378

i even took an atto bench and it shows something completely different,.
desktop2011110823344115.png


so hopefully someone can help me out. why are 2 benchmarks showing 2 completely different scores. both ssd are installed in port 1 and 2. there is nothing else hooked into my sata potrs. my odd is hooked into the jmicron controler.
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post #2 of 12
the problem is that you are using incompressible data. those drives rely on highly compressible data for top speed. get the new CDM and switch it to OFILL and you will get faster results (even though they wont equate to real world)
post #3 of 12
Thread Starter 
thanks for the input.

when adding the 2nd gt, i can definitely tell theres that extra oomph when im opening or installing something. i give it that much. these drives are fast. i was just concerned at the write speed. 188.7 mb/s is actually lower than what i got when i had just one gt. i did take your advice and re ran CDM with 0fill. the results came back to what i was expecting. 816.8 mb/s read/792mb/s write. also, ive been hearing that the amd controller isnt up to par like how the intel controller is on the chV. is there any truth to this. i want to get the best performance possible even if that means exchanging this board for the chV.
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post #4 of 12
yup, AMD does lack a bit of the power of the intel offerings, especially with latency. Latency of course is the bringer of snappiness, so it does lose some performance in that respect. Only option is different board or a hardware raid controller, which you can just use as passthrough.
post #5 of 12
I have a Sabertooth as well - with some SSD's in raid0. In RAIDXpert there are a couple of settings that should be set for best performance, unfortunately I can not enable them, have asked the question multiple times and it seems like no one on the planet knows how to set them either - maybe you will have better luck.

In RAIDXpert, go to the logical drive view - click on the raided set of SSD's - in the logical drive information area that then opens, click on settings. Here you will find the Read cache Status and the Write Cache Status. Read should be set to 'Read Ahead' and Write should be set to 'Write Back'. Mine is set to 'No Cache' on the read and 'Write Through' on the write - RAIDXpert will not change these for me. If you can figure out how to enable them - please post back.

Like I said, I have asked the question on multiple forums with no answer. I did see a screen shot of the settings set correctly by someone with a Gigabyte board, but didn't get an answer from him on how he enabled those settings.

Looks like this one as well as the existence of Sasquatch shall go unanswered.

EDIT: from what I have read AS-SSD is a better tool than CrystalDiskMark for your SSD's. Maybe someone can elaborate on that?
Edited by sequoia464 - 11/12/11 at 9:23am
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post #6 of 12
Thread Starter 
Quote:
Originally Posted by sequoia464 View Post

I have a Sabertooth as well - with some SSD's in raid0. In RAIDXpert there are a couple of settings that should be set for best performance, unfortunately I can not enable them, have asked the question multiple times and it seems like no one on the planet knows how to set them either - maybe you will have better luck.
In RAIDXpert, go to the logical drive view - click on the raided set of SSD's - in the logical drive information area that then opens, click on settings. Here you will find the Read cache Status and the Write Cache Status. Read should be set to 'Read Ahead' and Write should be set to 'Write Back'. Mine is set to 'No Cache' on the read and 'Write Through' on the write - RAIDXpert will not change these for me. If you can figure out how to enable them - please post back.
Like I said, I have asked the question on multiple forums with no answer. I did see a screen shot of the settings set correctly by someone with a Gigabyte board, but didn't get an answer from him on how he enabled those settings.
Looks like this one as well as the existence of Sasquatch shall go unanswered.
EDIT: from what I have read AS-SSD is a better tool than CrystalDiskMark for your SSD's. Maybe someone can elaborate on that?

im not able to change those settings either. if you find out something, let me know.
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post #7 of 12
Quote:
Originally Posted by firestorm1 View Post

im not able to change those settings either. if you find out something, let me know.

I have subscribed to the thread - will post back if I find something.

You would think that with all of the AMD users on these forums someone would have an answer.
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post #8 of 12
On page 20 of the RAIDXpert guide (http://www2.ati.com/relnotes/AMD_RAIDXpert_User_v2.1.pdf), it says that the cache policy settings cannot be changed. It's possible they are motherboard specific or would require a registry hack or something. Perhaps it's a legacy feature that they disabled in more recent drivers? I cannot verify as none of my AMD systems have a RAID.
Quote:
Originally Posted by firestorm1 View Post

also, ive been hearing that the amd controller isnt up to par like how the intel controller is on the chV. is there any truth to this. i want to get the best performance possible even if that means exchanging this board for the chV.

There is no Intel controller on the Crosshair V.
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post #9 of 12
Thread Starter 
yea your right. i mis took the lan for the raid controller. tongue.gif i need new contacts biggrin.gif




anyways, a friend told me to run the 0fill test on CDM and see what it does. im guessing this is the right test because it comes somewhat close to ATTO.

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post #10 of 12
Quote:
Originally Posted by Blameless View Post

On page 20 of the RAIDXpert guide (http://www2.ati.com/relnotes/AMD_RAIDXpert_User_v2.1.pdf), it says that the cache policy settings cannot be changed. It's possible they are motherboard specific or would require a registry hack or something. Perhaps it's a legacy feature that they disabled in more recent drivers? I cannot verify as none of my AMD systems have a RAID.
There is no Intel controller on the Crosshair V.

I read that, thanks. I have seen these settings enabled however on 990FX boards . This link is for a Gigabyte 990FXA-UD5.

When you go have RAIDXpert open, go to the help menu, under Logical drive View click on settings, in my version of RAIDXpert it very clearly states that you can select the different settings. I believe that I have even heard of someone with a sabertooth having these settings enabled.

link .. http://forum.crucial.com/t5/Solid-State-Drives-SSD/M4-64GB-RAID0-on-990FX-performance-issue/td-p/59800/page/2
Edited by sequoia464 - 11/13/11 at 3:03pm
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