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Old 08-26-2009, 03:47 AM   #1
videoclock
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How to test the RAID speed


Hi people!

What application do you use to test the speed of a software or hardware RAID?

I've heard speed that hdparm says is not reliable with RAIDs.

Thank you in advance.
 
Old 08-26-2009, 04:06 AM   #2
colucix
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Take a look at http://www.iozone.org/. IOzone is suggested by the Software RAID HowTo.
 
Old 08-26-2009, 04:28 AM   #3
mushroomboy
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Test any program that does heavy hdd read/write... A lot of performance programs test cpu/ram/gpu but they don't test hdd speeds... You want to look for something that is testing hdd speed, if you have Gigabit connections to another computer... I'd say do transfers, that'd give you the fastest speeds.
 
Old 08-26-2009, 05:04 AM   #4
videoclock
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Ok, thanks, colucix and mushroomboy.

IOzone seems to have a lot of options, which can be good for doing detailed tests.

Thanks!
 
Old 08-26-2009, 05:20 AM   #5
mushroomboy
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Yeah I went through the same thing when I switched from ATA to SATA back when it first started... I also just started using Ext4 which is supposed to be faster... I'm not testing ext4 cause these days I could care less, but when ATA went to SATA you bet we tested. Just make sure the programs do extensive read/write tests and you should be fine. Moving/copy files should be the best of tests. Such as take a 1G file and move it from one computer to the next... Granted you have a connection that works... You could just do from one RAID to another... As if you have 4 SATA drives, raid 2 and raid the other 2 and do tests between the two. If you notice an improve ment you might want to see if doing raid on all 4 works (yeah some might say 4 drives is too expensive but with todays markent I can see people doing that). Also you will want to research on which raid you want to use, as some have speed improvements vs security improvements. When I say security, I men less data corruption... or the idea of preserving data.
 
Old 08-26-2009, 05:35 AM   #6
videoclock
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Testing downloads from another PC in the network is a good point to test the RAID speed. Thanks. And about the prize of hard drives, i've seen 300 GiB drives at 10 euros in ebay (I don't know if they are really new).

Thanks.
 
  


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