Can't write to non-OS HD

Discussion in 'Mac Pro' started by ventro, May 10, 2010.

  1. ventro macrumors 6502a

    Joined:
    Sep 23, 2006
    #1
    Starting today, when I try and write anything to my non-OS harddrive (with my music library and data on it), OSX gives me the error:

    "The data can't be read or written"

    The permissions seem to be fine. I can open files on the HD fine, but they open a little slow. So basically I only can't write to the drive.

    What's going on? Is my HD dying?
     
  2. spinnerlys Guest

    spinnerlys

    Joined:
    Sep 7, 2008
    Location:
    forlod bygningen
    #2
    Just out of curiosity, what format / file system are those HDDs using and did permissions or even disk repair via Disk Utility help?
     
  3. riscy macrumors 6502a

    riscy

    Joined:
    Jan 4, 2008
    Location:
    China
    #3
    Sounds like it is a Windows format - you can read but not write to it. Have you used it on a Windows machine recently?

    You might need to reformat after copying all the data off. Then you choose the correct format that is accessible by both Win and Mac OS.
     
  4. ventro thread starter macrumors 6502a

    Joined:
    Sep 23, 2006
    #4
    It's HFS+, and has been its entire life.

    Disk Utility says it "appears to be OK"
     
  5. Loa macrumors 65816

    Loa

    Joined:
    May 5, 2003
    Location:
    Québec
    #5
    Hello,

    Is the drive old? Is the "Ignore permissions on this volume" checkbox marked?

    My advice, regardless of the answers: make a complete back-up of that drive. And I mean now. Drives can fail slowly, then completely die on you very fast. The first thing you should do right now is back it up.

    Then, if you can, find a better diagnostic tool and check your drive thoroughly. If you can't check it using a serious app, back it up and throw it away.

    Hard disk drives can be had for very little money these days, but your data cannot be "replaced".

    Loa
     
  6. nanofrog macrumors G4

    Joined:
    May 6, 2008
    #6
    As it's formatted properly and mounted, I have to agree here unfortunately (i.e. bad sectors that contain the Partition Table would be a strong suspect).
     
  7. ventro thread starter macrumors 6502a

    Joined:
    Sep 23, 2006
    #7
    So in a last ditch effort a week ago, I moved the HD from Bay 4 to Bay 1 to see if that would have any effect. It worked!

    But today, it's broken again. Same problem: Can read, but can't write. So I guess I need to buy a new 1TB HD to back up all of this data on before I format it? This sucks!
     
  8. Loa macrumors 65816

    Loa

    Joined:
    May 5, 2003
    Location:
    Québec
    #8
    The more you use or try to fix your HD, the more chances it has of completely dying, meaning that you won't be able to read it AT ALL.

    You needed a back-up drive 10 days ago: you're playing with fire.

    Loa
     

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