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Hardware Thread, Recover data from broken RAID 0 array in Technical; I've been asked if I can look into recovering some data from a broken RAID 0 array. Has anyone has ...
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    Recover data from broken RAID 0 array

    I've been asked if I can look into recovering some data from a broken RAID 0 array. Has anyone has any success in doing this? They're not overly bothered about the data, so spending hundreds on getting a data recovery company to do it is out of the question.

    There's 3 drives in the array and one is completely borked. It's proper hardware based RAID just for some stupid reason they didnt go with RAID 5!

    Am i right in thinking every file is spread across the 3 drives or might 2 of the drives have some complete data?

    Active File Recovery for Windows says it can reconstruct a broken RAID 0 array and could recover some data, has anyone used that or has anyone got any suggestions?

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    webman's Avatar
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    Re: Recover data from broken RAID 0 array

    Websites on RAID say this about level 0:

    Not a "True" RAID because it is NOT fault-tolerant

    The failure of just one drive will result in all data in an array being lost

    Should never be used in mission critical environments
    IIRC, RAID 0 is used to increase disk capacity and performance.

    I'd give the software a go.

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    Re: Recover data from broken RAID 0 array

    Yeah I know there's no fault tolerance in RAID 0, just wondering what the chances are that there's some data on the two good drives?

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    Re: Recover data from broken RAID 0 array

    Quote Originally Posted by indie
    Yeah I knew there's no fault tolerance in RAID 0, just wondering what the chances are that there's some data on the two good drives?
    The data is striped across the disk, so the blocks of data will end up on all the drives. Lose one, lose everything. Its gone, dead, expired, passed on.

    This is the risk with raid 0

    and why I use raid 10 instead for my high performance applications. You would need a data recovery company to resurect the dead disk. I suppose small files may exist on a single block.

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    webman's Avatar
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    Re: Recover data from broken RAID 0 array

    If you need it back, try CBL Data Recovery, they have an office in the region. (Royal Quays)

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    Re: Recover data from broken RAID 0 array

    Quote Originally Posted by DMcCoy
    The data is striped across the disk, so the blocks of data will end up on all the drives. Lose one, lose everything. Its gone, dead, expired, passed on.
    Heh, thats what I thought! Oh well, at least it's not my data, i'm not stupid enough to use RAID 0!

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    Re: Recover data from broken RAID 0 array

    Are all the disks still alive? If so, try this: http://www.runtime.org/raid.htm

    That help me recover more than 300GB of data on a RAID 5 array when the raid controller it was sitting on died.

    If not, as already said you're pretty much screwed.

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    Re: Recover data from broken RAID 0 array

    Looks like a decent app that probably worthy of an entry on the essential software list on the wiki Id say.
    Can also run from a Win PE CD Rom even better

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    Re: Recover data from broken RAID 0 array

    I can get the drive to power up without it clicking like hell now, so I might give RAID reconstructor a go!

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    Re: Recover data from broken RAID 0 array

    For RAID 0 to give any kind of performance benefit, the data MUST be divided between the disks which would surely mean that any data recovered from one disk is going to be swiss cheese at best. If it's the case that the blocks are split alternately between the two disks then you'll only recover half the blocks. Even with a large block size, the data will be full of holes!

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    Re: Recover data from broken RAID 0 array

    Every 3rd section of data written to the disk would be corrupt so even if you manage to recover some of the files they're likely to all be full of missing data from the dead drive :? Unless you can somehow recover the data from the dead drive I don't think you'll manage to piece together anything useful.

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    Re: Recover data from broken RAID 0 array

    A clean room, lab coat and some very large hammers methinks?

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    Re: Recover data from broken RAID 0 array

    CBL Data Recovery are going to do a free evaluation of the RAID array, they said the prices range from £1000 upwards and the people who's data it is amazingly are going to pay it!

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    Re: Recover data from broken RAID 0 array

    Re: CBL. Yeah they will tell you if they can get it back or not. Speaking from experience here.. they charged £580 or thereabouts for a Seagate 200GB disk of mine formatted as linux/ext3. They managed to get back just about everything. Obviously with RAID it's a different matter.

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    Re: Recover data from broken RAID 0 array

    They said the price starts at £1000 because it's a RAID 0 array and there's more than just one drive involved!

    Not looking forward to the tyne tunnel this evening!



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