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2TB RAID1 over 4x1TB disks

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ilovetechnology   08-13-2009 at 09:30:47 PM

Hello all,

I am planning on making a spare computer (Dell Optiplex GX280, Windows XP Pro) into a storage server. The mobo has two SATA ports and I am purchasing a software RAID card to add 4 extra SATA ports.

My question is, is it possible to configure the computer to have 1 system drive (non-RAID) and 4x1TB drives in RAID1 to mirror 2TB?

Thank you all very much for the help.


Message edited by ilovetechnology on 08-13-2009 at 09:32:16 PM
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wathman   08-13-2009 at 10:27:47 PM
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as long as the RAID controller you are purchasing supports it, and I think it should, it sounds like what you really want is a RAID 0 + 1 array. you are basically creating 2 RAID 0 arrays, and then using the second array to mirror the first. This is still a pretty reliable setup as it would take simultaneous failures of 1 drive in each array to be unable to recover the data.

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Bronze Storage badge cjl   08-13-2009 at 10:38:28 PM
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You want RAID 10 - most modern controllers support it. It would create a pair of 2TB RAID 0 arrays, and then create a RAID 1 array with the RAID 0 arrays for a total of 2 TB of fully redundant space.

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wathman   08-13-2009 at 10:43:45 PM
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cjl wrote :

You want RAID 10 - most modern controllers support it. It would create a pair of 2TB RAID 0 arrays, and then create a RAID 1 array with the RAID 0 arrays for a total of 2 TB of fully redundant space.



I usually don't get very fancy with RAID arrays, most of the time I'm using 0, 1, or 5 in my builds. I've never used a raid 0 + 1 or a RAID 10 before, just read a little on 0 + 1 back when I first learned about RAID arrays in general. how are they different?


Message edited by wathman on 08-13-2009 at 10:44:21 PM
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Bronze Storage badge cjl   08-13-2009 at 11:55:01 PM
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They are a standard RAID type, though fairly uncommon for home use (since they require at minimum a 4 disk array). They are set up just like any other RAID array (for a given controller), and should work the same as any other array once they are set up. It shouldn't be too difficult. You would not have to manually set up the RAID 0 arrays or anything - there should be an option when creating the RAID to set up a RAID 10 volume, you then select the disks you want to include, and you should be good to go. Make sure the SATA card you buy supports RAID 10 though.

------------------------------ Asus P6T deluxe
i7 965 @ 4.2GHz (200*21), 1.384V
12GB Corsair Dominator DDR3-1600 CAS 7
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ilovetechnology   08-15-2009 at 01:28:23 AM
- 0 +

Thank you for the information all, it was very helpful.

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