Internal drive not detected/available

Discussion in 'Mac Pro' started by gdc, Sep 16, 2009.

  1. gdc macrumors member

    Aug 11, 2009
    My Mac Pro, used very little as yet in this life following a fortuitous acquisition from my former company, is failing to recognize one of the three hard disks.
    I have a 320 gb system disk running Snow L, and two 500 gb disks which are currently empty of data.
    Following boot, the second of the 500 gb drives isn't available - it doesn't appear on my desktop, or in Finder, or in the side bar when I launch Disk Utility.
    The system profile information returns a single line saying there was an error when trying to detect information about my disks - it doesn't give me information on any of them.
    In its previous life this disk was a mirrored RAID array (with the other 500 gb drive) used a shared file server for standard office documents etc in what I would call a modest load environment - it was no media studio!
    Any thoughts? Thanks.
  2. gugucom macrumors 68020


    May 21, 2009
    Munich, Germany
    I also lost a 250 GB drive to a Highpoint RAID card. It will not be recognized by any normal SATA port. If I hook it up to a RAID capable card it will be detected though. I think certain RAID cards modify the basic drive addressing such that you cannot use them with anything but the RAID card.
  3. gdc thread starter macrumors member

    Aug 11, 2009
    Thanks, but I don't think this is the cause as I was ony using the drive as part of a software RAID through Disk Utility of Leopard Server.
  4. Tesselator macrumors 601


    Jan 9, 2008
    I have this problem with CF cards sometimes. Typically the solution is to format it on a different machine. In your case maybe a friends PC or something? That would let you know if it's actually the drive I think too.

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