Could not unmount disk (-10000)

Discussion in 'Apple' started by Guest, Feb 24, 2007.

  1. Guest

    Guest Guest

    I have two internal hard drives in my G5 Powermac (10.4.8) and I mirror
    the second with SuperDuper and it's bootable. Neither drive is
    partitioned. I'd like to be able to startup from the second drive and
    run directory checks, etc. on the main drive with Disk Utility and
    DiskWarrior but both of these programs return error codes saying, in the
    case of DU, "Verify volume failed with error Could not unmount disk
    (-10000)". DW says it can't access the volume because it is still in
    use. Both DU and DW can access the second drive when started up from the
    first, however. If there's something I can do to make my main drive
    unmountable when the computer starts up from the second drive I'd
    appreciate hearing what it might be. DiskWarrior takes forever to start
    up the computer off its CD. Thanks.
    Guest, Feb 24, 2007
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