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Two HDD using raid0 vs 1 HDD alone

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June 10, 2011 8:18:37 PM

Hi all, is there a noticable speed increase when going from 2 hardrives using raid 0 as your main OS drive versus only 1 HDD?

More about : hdd raid0 hdd

a c 311 G Storage
June 10, 2011 8:23:55 PM

Short answer: Yes. A good RAID0 implementation will notably improve your serial read rate, so going to one will reduce read speed somewhat. Programs will take longer to load, ....

Long answer: RAID 0 also triples (or so) your chance of system failure. Keep backups, including backups of the OS. Having only one HDD is my choice, for reliability. Of course, I blew the money on an SSD, and I have multiple external backups, because I am a G*E*E*K.

Edit: I just re-read this. You say going from RAID0 down to a single disk. Unless you have a lousy RAID0, I would expect the single disk to read noticeably slower, and write in the same range as the RAID0 or a little worse. Unless the one HDD is much faster than both of the ones you have in RAID now. RAID0's functions are increased speed and increased space, compared to a single drive.
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June 10, 2011 8:35:59 PM

i will only have the OS and my applications on this raid0, so reliability is not really an issue for me. and the hardrives in question are all the same. now I know that theoretically the raid0 is faster than the single hardrive, but we're talking about a normal desktop computer where I use it for internet, downloading, converting video files, and soon a couple of games. this is not a server. would I still notice a difference?
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a c 179 G Storage
June 10, 2011 8:36:23 PM

What kind of speed are we talking about here?

General os and desktop usage will be virtually the same with two drives in raid-0 vs. a single drive.

That is because the os does mostly small random reads and writes.
Raid-0 only does a good job on apps that do large amounts of sequential processing. and on sequential benchmarks.

If you want a difference that you can notice, look into a SSD.
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