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Intel Matrix Storage Manager offers several levels of RAID. Most of these I am familiar with (RAID 0 striping, RAID 1 mirror, RAID 1+0 striped mirror, RAID 5 striping with redundancy). But there's also a "Recovery Set". What is this and how does it differ from RAID 1 mirroring?

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Its a recovery-backup solution, see this PDF for documentation.

Its part of the Intel Rapid Recovery Technology

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Ahh, so it's a mirror to an external drive that's not always available. That explains everything perfectly (except for why the feature is included on server motherboards). – Ben Voigt May 9 '12 at 21:07
It seems that choosing RAID 1 instead of "Recovery" may cause inconvenience when a disk is failed... – Bossliaw Nov 5 '14 at 16:45

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