Mirrored RAID issue

By Hodsocks
Dec 29, 2010
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  1. I have been working on a pc with 2 x 320GB SATA drives in a mirrored RAID configuration, the mobo is an ASUS M4A79XTD EVO. I was working inside the case, when I had finished I started up the pc but received a critical message about the RAID missing a drive, when I looked inside the case I noticed that I must have knocked one of the power supplies to one drive off, I reconnected it but on boot up I have the same message. The BIOS is detecting all drives and once in windows 7 all drives are detected but as 2 seperate drives.
    How do I get these drives back to the original RAID configuration?
    I have checked through the RAID software but I can't find anything allowing me to repair the RAID.
  2. Cota

    Cota TS Enthusiast Posts: 513   +8

    Go to your BIOS and re-configure it, check your manual formore info.
  3. Tmagic650

    Tmagic650 TS Ambassador Posts: 17,233   +234

    With RAID enabled in the bios, there should be a screen during boot up allowing you to press control-i or something like that to re-configure the RAID Array
  4. jobeard

    jobeard TS Ambassador Posts: 9,145   +597

    under no circumstance, elect to reformat either HDD or the Array itself - -
    that is catastrophic to the existing data.

    hopefully, you have a backup and if so, you can recover the data if the above reformat is required
  5. Tmagic650

    Tmagic650 TS Ambassador Posts: 17,233   +234

    The RAID utility (outside the bios) might just allow rejoining the missing hard drive to the array without formatting
  6. jobeard

    jobeard TS Ambassador Posts: 9,145   +597

    YES (the better S/W does), but the onboard software (as apposed to the Raid-PCI cards) seldomly does :(
  7. Tmagic650

    Tmagic650 TS Ambassador Posts: 17,233   +234

    I played with my striped RAID array. I wanted a 1TB array, but I had to add an additional 450GB drive to my 2 500GB drives to get to 1TB due to disk overhead. I do think I had to reformat the entire array to add a drive though
  8. Hodsocks

    Hodsocks TS Guru Topic Starter Posts: 370

    The system is happily booting into windows but then you would expect it being a mirrored setup as both drives should be identical. The one thing I noticed in Disc Managent in control panel is that although both drives appear to be identical the second drive has a small 70MB partition that the other one doesn't have, could this be the cause of confusion, if I get windows to increase the partition size to absorb this would the RAID work OK?
  9. Tmagic650

    Tmagic650 TS Ambassador Posts: 17,233   +234

    All 3 of my RAID drives show as one drive, 1.09TB in Disk Management. No separate drives exist

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