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Raid 0 vs raid 1 random I/O performance

post #1 of 6
Thread Starter 
Ok, ive got an ASUS P5Q-E motherboard coming, and i want to use the integrated Silicon Image Sata controller on it for a raid setup using a pair of 40Gb sata HDDs that i would put my swap file as well as a few other things on.

However, one question that has been nagging me is what raid mode (either 0 or 1) provides the best random I/O performance ie which one will reduce seek times for a single chunk of data the most across 2 disks. Ive looked it up on the internet but the answers ive found are inconclusive at best.

And if no one knows, I'll probably go through the effort of doing various benchmarks with different disk configurations to see what gets the best performance and then post the result.

Heres a review of the board BTW: http://hardwarelogic.com/articles.php?id=5455
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post #2 of 6
RAID 0

http://www.overclock.net/t/484367/guide-all-you-ever-wanted-to-know-about-raid
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post #3 of 6
RAID 0 is what you are thinking off.. it distributes (stripes) data across two or more disks but offers no redundancy.. RAID 1 is a mirror of one disk on another and can increase read performance in theory.. offers redundancy but at a cost of sacrificing performance and usable space which IMO is better than RAID 0.. either way all RAID arrays should be backed up as all a prone to failures from such things as viruses corrupt data and so forth smile.gif
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post #4 of 6
Thread Starter 
Neglected to mention in the first post: This is for a pair of 40Gb sata drives on which my swap file will be placed. It needs to be able to have good random I/O read performance. Basically i couldnt care less if the drives ate it because thats all thats going to be on them: a 5GB partition with the swap file in it. The rest of the drive space will remain unused.
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post #5 of 6
Quote:
Originally Posted by Cyrious View Post

Neglected to mention in the first post: This is for a pair of 40Gb sata drives on which my swap file will be placed. It needs to be able to have good random I/O read performance. Basically i couldnt care less if the drives ate it because thats all thats going to be on them: a 5GB partition with the swap file in it. The rest of the drive space will remain unused.

As far as I remember the Intel controller is better than the SI one, if you've got spare ports on the intel controller I'd run that.

I found a thread with a comparison between the two controllers on xtremesystems and it looks like you are a little better off with the Intel one.

Edit: That said, it's not a massive difference really. If the SI controller is easier to set up you're not giving up much performance by going with it instead.
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post #6 of 6
Thread Starter 
Quote:
Originally Posted by Mike-IRL View Post

As far as I remember the Intel controller is better than the SI one, if you've got spare ports on the intel controller I'd run that.
I found a thread with a comparison between the two controllers on xtremesystems and it looks like you are a little better off with the Intel one.
Edit: That said, it's not a massive difference really. If the SI controller is easier to set up you're not giving up much performance by going with it instead.

Hmm nice read +rep

Yeah the reason i went with the SI controller is because all i really had to do was hook up the drives, set the controller to speed mode (Raid-0), and then format the resulting device that windows ultimately saw.
Doing it through the Intel controller is something i am a bit iffy with due to the fact it might do something unpleasant with my other drives. it might, it might not, but id rather not risk it, especially since the intel controller and the drives attached to it manage approximately 90% of my total data storage.
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