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  1. #1

    Member Since
    Apr 08, 2012
    Cannot format external harddrive
    I have a Seagate 1.5 TB external. I can no longer read data from it. I want to erase all data and reformat.

    Conventional Efforts:
    When I plug it in to my MBP (via Firewire 800), it shows up on the desktop as mounted. However, when I try to access the files on it via Finder, Finder crashes (beachball). I open disk utility, and I can see the disk. When I press erase, the dialog is stuck at "Unmounting Disk".

    Why does this happen?

  2. #2

    louishen's Avatar
    Member Since
    Oct 22, 2007
    Mac Mini Core i7 2012 | White 2009 MacBook 2 Ghz | 733 Mhz G4 Quicksilver
    Sounds like the disk has gone south

    But first try a disk repair in Disk Utility
    Member of the Month September 2008 & August 2012 | Found advice useful? use the rep system

  3. #3

    Member Since
    Apr 08, 2012
    Ya, I figured as much. Any operation in DiskUtility leads it to hang. I "fixed" everything by erasing the disk through diskutil then repartitioning it.

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