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Asked: 2012-01-12 20:50:05 +0800 CST

Do I lose RAID array if I switch RAID controller

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If I have a RAID array and I switch out the controller to a newer controller, does this destroy the array?

E.g. I have 6 drives as 1 RAID0 array. If I upgrade the controller to a different one, but don't configure anything, should I be able to plug the old controller back in and the array would be unharmed?

raid

3 Answers

  1. Depends on the controller.

    Modern controllers should take over the RAID between models as they store the RAID config on disc and maintain a compatible metabase. Adaptec for example does it so.

    Others can be handcoded to accept the old arrays.

    Some can not.

    RTFM - read the .... manual - is the only solution here. It is documented there. If not, ask the controllers manufacturer.

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  2. The major enterprise-level vendors use a common metadata format across their own product lines - HP, Dell, Adaptec, 3ware, Areca, LSI, etc - but given the criticality, it doesn't hurt to confirm this with the vendor.

    You will not find any compatibility if you cross brands, guaranteed.

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  3. Generally speaking: No, this will not work, but might work when you use a newer model from the same vendor. The reason is that the on-disk structure of a hardware RAID controller is proprietary.

    When in doubt, contact vendors support.

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