Can't format external HD

Discussion in 'Mac Basics and Help' started by gavsko, Jun 15, 2008.

  1. gavsko macrumors newbie

    Jun 15, 2008
    I was given a 2.5" USB Sumvision SATA drive by a PC friend of mine. On
    the box it says it will work with OSX. When I plug it in it appears on
    the desktop but I cannot format (the options are greyed out in disk utility) or copy to it. It's currently in Windows NT format (which I know the Mac can't copy to). I don't have anything like Norton that could possibly help.

    I run a G4 quicksilver 10.3.9 (old I know).

    Am I missing some software or is my kit to old to run SATA?

    Should I just give him his disk back and say thanks but I don't really
    need it?
  2. jodelli macrumors 65816


    Jan 6, 2008
    Windsor, ON, Canada
    First off, Quicksilvers only have USB 1.1 @ 12Mbit/s so a newer USB 2.0 to SATA adapter would drop to the old speed from 480Mbit/s.

    It's too old to run it in the original configuration.
  3. Cave Man macrumors 604

    Cave Man

    Feb 12, 2007
    Neander Valley, Germany; just outside Duesseldorf
    In Disk Utility, click on the hard drive (and not the Windows volume that is below and indented), then click on the Partition tab and select your number of partitions from the pulldown. If you want to boot from this drive, you have to select GUID for Intel macs or Apple Partition Map for PPC macs from the Option button.
  4. gavsko thread starter macrumors newbie

    Jun 15, 2008
    All sorted, had to get it formated again on a PC, then all OK to format on the Mac. Why? Who knows.

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