SSD redundancy via HDD

Posted by Mascarpone on Server Fault See other posts from Server Fault or by Mascarpone
Published on 2011-11-12T17:47:09Z Indexed on 2011/11/12 17:53 UTC
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Filed under:

failover

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ssd

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redundancy

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hdd

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raid1

Is there a way to guarantee redundancy to an SSD using an HDD?

Raid 1 is the best choice to guarantee redundancy in HDDs, but SSDs are too expensive to guarantee redundancy via RAID. If I was to couple an SSD with an HDD, could I guarantee redundancy using the HDD as a failover device, and lazily mirroring the data on the HDD? (e.g.: every 5 minutes the data should be synchronized, rather than in real time like with Raid 1).

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