Raid5 with 4 drives no Hot Spare

Posted on 2011-10-25
Last Modified: 2012-05-12
We have 4 hard drives setup as a Raid 5 with no hot spare.  One of the drive went bad the other drive was never put online or initialize.  Is there any way to recover the data?  Is there services that can recover the data?
Question by:TAS-IT
    LVL 10

    Expert Comment

    So basically you are only using 3 drives? You should be able to add it to the array and tell it to rebuild.
    LVL 55

    Expert Comment

    Question doesn't make sense, RAID 5 with no hot spare means all the drives are online. If one failed it should keep going albeit much slower than usual, RAID 5 can tolerate a single disk failure.

    Author Comment

    I have 4 drives configured as a Raid5.  When it was setup, maybe one drive was not online and I didn't notice it and now a second drive went offline.  Now it won't rebuild itselft.
    LVL 55

    Accepted Solution

    You mean one drive failed a while ago and didn't get replaced and now a second drive has failed? It's toast then, can't be recovered unless you get the second drive to fail to come online.

    You could get the 2 surviving disks and the recently failed one on a non-RAID controller and image them, if the recentlt failed drive can be recovered long enough to read then RAID reconstructor from can de-stripe the data but it does rely on the disk that's recently failed being readable. Without that the data isn't complete. You could send it all off to a data recovery company, they can probably figure out which of the two failed disks is the recently failed one and repair it, quite often it's not the actual platters that are faulty.

    Author Comment


    what company do you recommend sending the disk drives to?  I would like to follow your instruction, but I am afraid, i mess it up even more

    LVL 69

    Assisted Solution

    Gillware is not too expensive and is recommended by many top experts here.

    Author Closing Comment

    Thank you all for your help

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