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  1. #1
    Hard drive stopped being recognized

    Member Since
    Oct 17, 2011
    Posts
    13
    Exclamation Hard drive stopped being recognized
    I cant open my external Hard drive. Its a Lacie and its got its own power supply. It was working fine until I did a clean install of OS Lion. Now I can't accesses it. It appears in disk utility but instead of what I called it "AC Drive" I it is called disk2s2. Its greyed out and any attempt to repair or verify returns this message

    Invalid Volume Header @ 0: unsupported format
    Invalid Volume Header @ 319728958976: unsupported format
    disk3s2 has CoreStorage features not supported by this fsck_cs version
    Problems were found with the partition map which might prevent booting
    Error: Storage system verify or repair failed.

    Any advice?

    Ive tried disk warrior. Since I heard it recommended but I can only select my drive in the hardware tab which tells me nothing other than the device is functioning normally.

    Pretty fed up with this problem as Ive already spent all of my free time this week attempting to solve it.

  2. #2
    Hard drive stopped being recognized
    osxx's Avatar
    Member Since
    Jan 19, 2008
    Location
    houston texas
    Posts
    4,695
    Specs:
    09 MBP 8GB ram 500GB HD OS 10.9 32B iPad 4 32GB iPhone 5 iOs7 2TB TC Apple TV3
    Try using it on another computer just to see if it will show up also you might want to check the power supply I had a Lacie act up and it was several volts shy on output a new power supply fixed it then a year later the board went D.O.A. Like a lot of hard drives of late you may also need a firmware update to work with Lion.

  3. #3
    Hard drive stopped being recognized
    harryb2448's Avatar
    Member Since
    Nov 28, 2007
    Location
    Nambucca Heads Australia
    Posts
    20,031
    Specs:
    iMac i5 2.7GHz, 16GB memory, OS 10.10.5
    Was the drive freshly formatted Mac OS Extended (Journalled) GUID set up after running Repair Disk prior to install?
    Hang on to those original install discs like grim death! Using OS X.7 or later make a bootable USB thumb drive before running Installer!

  4. #4
    Hard drive stopped being recognized
    dtravis7's Avatar
    Member Since
    Jan 04, 2005
    Location
    Modesto, Ca.
    Posts
    28,478
    Specs:
    iMac late 2007 10.11.b4, iMac 2008 10.10.5, Macbook2007 10.7.5, Mac Mini 10.7.5, iPhone 3GS Note 8!!
    How is this Lacie drive formatted? Is it Mac Extended (Journalized) like Harry asked or some Windows format?

  5. #5
    Hard drive stopped being recognized

    Member Since
    Oct 17, 2011
    Posts
    13
    Thanks for the replies. I don't have another mac I can try the hard drive on. It was formatted OS Extended before the install.

  6. #6
    Hard drive stopped being recognized

    Member Since
    Oct 17, 2011
    Posts
    13
    Well the problem is sorted. I resorted to using a data recovery tool. "Data Rescue" from Prosoft. Its not cheap ($99). So Im sorry if to anybody viewing this post hoping for another answer but thats It I hav'nt attempted to reformat the hard drive yet but I'm guessing it will be fine. Data Rescue is a great program me but it is expensive and the demo only offers the recovery of 1 file up to 10mb which is pretty useless.

    Thanks for your replies
    Good luck

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