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Raid0 with Seagate barracuda 7200.12 500g

post #1 of 17
Thread Starter 
I've set up my raid0 with the following hd's. However, after checking around this forums and others on the performance and speed people are getting from these hds in a raid0 I saw that my speeds were falling short.

Most people with the same HD's got around 200 mb/s + while I'm stuck with a consistent 140 mb/s.

When I set up the raid0 array, I had two choices: AHCI through intel matrix storage and setting it up in the marvel bios. I originally installed it through ahci, but after installing the w7 I was getting very weird problems. (stuttering, programs wouldn't open etc.) So I switched back to the IDE marvel option which has a max stripe size of 64k, I think.

Motherboard: P55A-ud3 (its rated at 2.56gbps which is more than enough for the max external speeds fo 300 MBps for the hds.)

2 x 500g Seagate 7200.12 hds in raid 0.

23december20100206.png

Any reason I'm not getting the full intended speeds? Do I need a different setup or stripe size?

Edit: Actually now looking back at a few threads I do notice that most people have "intel" raid0 setups while mine is marvel. Also, does windows 7 have drivers for raid controllers or if I did a reformat would I need to install it before installing the OS.

blue.
Edited by blue4paper - 12/23/10 at 2:11am
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post #2 of 17
those drives can really only do 75-80MB/s by themselves, so 140 is awesome.

whoever got 200MB/s + with two older HDD's must have been lying.

EDIT: and btw the blue ports on your mobo are the intel ones and much better than the marvell controller wink.gif
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post #3 of 17
Thread Starter 
Yeah, I actually just noticed that now after reading around a bit more.

http://www.overclock.net/hard-drives-storage/645544-2-cheap-500gb-seagate-7200-12s.html

This thread in particular is where I noticed people with 200 mb/s + write time. But they're all using intel raid0 system. All on mechanical hds as far as a I see.


Also, if i install the Intel ICH10R raid0 array setup, will I need to preload drivers before windows 7 installation?

Because I originally installed via intel ICH10R and I had preloaded drivers right before w7 installation and when everything was done, I was having a hard time with the OS. Programs crashing, OS crashing etc. I'm thinking a bad driver could've been the problem for this?


Should my procedure just be: setup raid 0 with the " raid (xhd) achi " ---> install windows 7 ----> install intel drivers (matrix storage etc.)?

blue.
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post #4 of 17
I wouldn't worry about 140, but it looks like you're a bit controller limited.
The graph doesn't curve down going inward to the platters until the last 50GB.

I'd give the Intel controller another go, but you're likely only looking at 10-20 MB/sec improvement at the peak of the graph. Usually you can expect 80-85% or so performance from both drives in a RAID0 array with general use ( 1x Drive performance * number of drives * .85 ).

You might pick up a few MB/sec by increasing stripe size to 128k..
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post #5 of 17
What madness made you use the marvell controller? Redo your array with 128K stripe on Intel ports and reinstall your OS.
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post #6 of 17
Thread Starter 
does windows 7 come preloaded with drivers or should I load the drivers before installing the OS?
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post #7 of 17
Quote:
Originally Posted by blue4paper;11754448 
does windows 7 come preloaded with drivers or should I load the drivers before installing the OS?

If on your first install AHCI isn't enabled, Windows does not install the drivers. There is a registry fix, but it is more convenient to enable AHCI during your first install. Also, like others have said, make an image of your drives, then redo the Raid 0 with 128kb stripe on the Intel SATA ports with AHCI. You should see more performance.
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post #8 of 17
Thread Starter 
Awesome, just finished installing the raid 0 array with intel sata raid drivers and ran hd tune as soon as the format was done. Greatly improved speeds.

23december20101831.png


However, access time has increased by 2 ms; odd but maybe running it more than once will show more accurate and stable results.

Why does it say burst speeds of over 5000 mb/s?

edit: is it it fine to update the raid drivers after the w7 format? This wont cause any conflicts?

blue.
Edited by blue4paper - 12/23/10 at 6:49pm
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post #9 of 17
Quote:
Originally Posted by wumpus;11749276 
those drives can really only do 75-80MB/s by themselves, so 140 is awesome.

whoever got 200MB/s + with two older HDD's must have been lying.

EDIT: and btw the blue ports on your mobo are the intel ones and much better than the marvell controller wink.gif

what are you talking about? the 7200.12 drives get 125 solid. i had two in raid 0 and they pull 210 MB/s

i've got 5 in raid 0 now and they pull 500 MB/s

easiest way to get what it should be is add the sustained speeds of all the drives and take 20% off, thats what raid 0 SHOULD yeild.
Edited by Tucker - 12/23/10 at 6:50pm
post #10 of 17
Quote:
Originally Posted by blue4paper;11756960 
Awesome, just finished installing the raid 0 array with intel sata raid drivers and ran hd tune as soon as the format was done. Greatly improved speeds.

23december20101831.png


However, access time has increased by 2 ms; odd but maybe running it more than once will show more accurate and stable results.

Why does it say burst speeds of over 5000 mb/s?

blue.


nice, that 5 GB/s is probably just a glitch. 200 - 250 seems good. the access time probably increased because your in raid, more mechanical parts moving, or trying to move in sync.
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