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Suppose I have a RAID 5 array consisting of 4 disks. If I buy two new disks later, can I add them non-destructively to the existing RAID 5 array?

It could be a hardware RAID controller or Windows Server 2003 software RAID.

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closed as not a real question by Ward, Skyhawk, splattne Jan 21 '12 at 8:36

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Per the ServerFault FAQ, hypothetical questions are off-topic here. –  Skyhawk Jan 21 '12 at 8:03
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2 Answers

Hardware RAID controller: Depends on the controller. Read the manual or check with the vendor. It's certainly possible.

Windows Software RAID: No

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Well, here we go - it depends. "Could be a car or a truck" is not specific, and this dependes on specific models. Most PROPER hardware raid controllers allow that - some cheap ones do not.

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