External Disk no longer readable - how can I fixe it?

Discussion in 'MacBook Pro' started by Internationalus, Mar 19, 2013.

  1. Internationalus macrumors newbie

    Joined:
    Mar 19, 2013
    #1
    I purchased less than one week ago a 1TB Buffalo External Hard Drive model HD-PA1-OTU3-AP MiniStation Thurderbolt. I had formatted for use on Mac and PCs. I then downloaded some 500 GB of data on the disk.

    I used it on my MAC (13 inch Mac Retina, operating on OSX 10.8.3 ) and it worked just fine for the first few times. I tried to use on my desktop PC but it failed to recognize the disk.

    The same day in the evening I used it once to see a movie on my Mac (which was wonderful). When I finished I ejected the disk by dragging it in the trash.

    The next day when I tried to use it again on the Mac I received the following message:

    The disk you inserted was not readable by this computer.
    Initialize Ignore Eject

    When I pressed initialize and then the verify option, I received the following messages:

    Verifying partition map for “ST1000LM024 HN-M101MBB Media”
    Checking prerequisites
    Checking the partition list
    Problems were found with the partition map which might prevent booting
    Error: Partition map check failed because no slices were found.

    Any ideas what happened to my drive and how I can fixe it and not loose the data on the disk??

    Thanks for you advice!
     
  2. josephmccutchen macrumors member

    Joined:
    Aug 27, 2010
    Location:
    South Korea
    #2
    You tried doing Verify, good, but did you try doing Repair also?

    Do you have the 500GB of data on another source (internal/external drive, another computer, etc)?

    You said you formatted the drive for Mac and Windows; how did you format it?
     

Share This Page