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I have two hard disk drives, each of 1TB size.

How can I merge them and make them one drive in Windows Server 2008?

After doing that, how can I reinstall Windows on those hard drives, keeping the data?

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Do you mean like a mirrior RAID? Unless they are not at capacity it might not be possible to "merge" them and that certainly isn't the correc term. –  Ramhound Oct 31 '11 at 18:53
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up vote 3 down vote accepted

You are looking for RAID0, also known as striping. Check out this web page for more information.

As far as keeping data on both drives? You'll need to transfer it off the drives and recopy it over. I HIGHLY recommend having a backup and restoring it with that method. Although RAID0 is faster then individual disks, you are DOUBLING your risk for data loss on BOTH drives. Make sure all critical data is backed up!!!

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I took the liberty of correcting your spelling, because I don't want to titillate our readers too much. :) –  Shinrai Oct 31 '11 at 19:12
    
@Shinrai thanks :) I've nver ben the best speler. –  Jeff F. Oct 31 '11 at 20:08
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