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Thread: Raid question

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    Thundercats Ho! starbuck's Avatar
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    Lightbulb Raid question

    I have just bought a second hard drive and have a mobo capable of raid. Would I see any performance benefit in setting them both up in a raid array(this is 1st time I have had a second hd so 1st time I have had the option). If so, what is the best config and how would I go about setting one up?
    I do know everything, just not all at once. It's a virtual memory problem.

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    Real Ultimate Power! Grey M@a's Avatar
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    are the hard drives identical because if they aren't you wont have much luck raiding them to be honest, if you run it in stripe mode you may see a performance increase, in mirror you will see a lose of performance due to one HD being an exact copy of the other, if one dies the other one on a mirror will take over, on a stripe if one goes down they all do.

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    Quote Originally Posted by Grey M@a
    are the hard drives identical because if they aren't you wont have much luck raiding them to be honest, if you run it in stripe mode you may see a performance increase, in mirror you will see a lose of performance due to one HD being an exact copy of the other, if one dies the other one on a mirror will take over, on a stripe if one goes down they all do.
    Where's the loss?

    A good RAID1 implementation will provide faster reads than a single drive. However, RAID on a motherboard is never good, and uses the CPU to do everything.

    If you use RAID1, the array will be as big as the smallest drive. If you use RAID0, the array will be double the size of the smallest drive.

    I think for you, it wouldn't be worth the hassle - just whack the drive in as it is, without RAIDing it.
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    Check this thread for a bit of discusion on RAID arrays.

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    Also don't forget you would have to wipe your current drive before creating the RAID array - so that would mean backing everying up and re-installing everything on the new RAID array.

    Also as Kez pointed out - you will be limited in size by the smallest drive - so space on the larger drive would be wasted ... and in addition to this you will be limited in terms of performance to the slowest drive so you are better off only striping / mirroring if you have drive of identical size and performance.

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