Will recreating a RAID lose the data on an existing configuration?

Posted on 2006-06-07
Last Modified: 2008-01-09
I have a Windows 2000 Server that has 2 SCSI drives in a RAID 0 configuration with all of the companies main data on it. Today the controller card failed, so i removed the failed card and connected the 2 drives onto another controller.  When i did this and boot up the server, Windows 2000 detected the drives as one volume but it said the drive needs to be formatted. I click NO because there are data still on the drive. In the properties it couldn't see the data on it.  I then rebooted the server and went to the BIOS Adaptec RAID setup utility v1.12/66I (this is a really old server) In the configuration the Rebuild option cannot be selected, only the Create can be selected.  Will recreating the RAID drives lose the data thats existing on the drives?  If so, what can I do to recover the data on those drives?

Thank you,

Question by:ConSolIT
    LVL 87

    Assisted Solution

    Check out for raid reconstructor.

    Using a raid 0 array is the worst thing you can do to store data on. Raid 0 has absolutely no redundance, if you loose one drive in an array you generally loose all the data, the only chance of recovery being the tool mentioned above which can't be 100% succesfull, or of course restoring from your backup. Raid 0 should only be used for temporary data which needs very fast access, like when you are editing movies, but after the editing is finished it is absolutely necessary to move the good data to some safe place. Once you have recovered your data (It is probably better and much much quicker to restore from the backup, setup your server with raid 1!
    LVL 3

    Accepted Solution

    In general, yes recreating a RAID will wipe the drives.

    More to the point, I'm guessing this was a hardware RAID (managed by the controller - not by Windows)?  If it is hardware, then make sure you use the same controller running at least the same firmware version. If you use a different controller it may not correctly see the RAID volume. The same goes for different firmware versions - an older firmware may corrupt the RAID. YOu should also check whether the RAID configuration is stored on the controller or the drives.
    LVL 2

    Author Comment

    Rindi, I'm trying the utility now, thanks.

    Technologyworks, yes it is a hardware RAID, so then I'll go ahead and try to find the same controller. Thanks for the warnings.

    To both of you, I appreciate your comments and will give points once I get the data recovered. Depending on which one gets the data recovered will get the points. Thanks's going to be a long weekend:(

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