Yes, unplugging would be sufficient
by mrmacfixit - 7/2/11 6:31 AM
In Reply to: Just for a test by walkerdine
On the Disk Utility subject, while we accept that the DU is not very smart, we cannot accept that it will know that it cannot repair a disk.
If DU cannot repair a disk, it will say so after it has attempted to do so.
The usual cause of the Repair option being greyed out is because the machine was not booted from an external source, like the OS X installation disk.
You said you had "done that" when I suggested booting from the DVD. Are you sure that you were actually booted from the DVD?
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