View Full Version : Help! internal HD wont unmount

7th November 2007, 01:08 PM
I,m trying to erase my second internal HD with the disk utility app but I keep getting a warning

Volume Erase failed with the error:

Could not unmount disk.

any ideas what to do

7th November 2007, 01:10 PM
Tried restarting the computer?

7th November 2007, 01:19 PM
You don't have anything on the second drive that loads at startup or any system files by any chance??

7th November 2007, 01:22 PM
I used migration assistant when I loaded Leopard would that have copied certain files across?
restart has no effect

7th November 2007, 01:26 PM
try from Terminal:

diskutil list <enter>

then identify the drive, and:

sudo umount /dev/diskX (possibly disk1)
enter your system password (if your the system administrator)

then try erasing in disk utility

7th November 2007, 01:30 PM
Boot from install media and format the drive having issues..

7th November 2007, 01:34 PM
What purana said.