I'm trying to erase and reformat an external hd, i bought a new one for my macbook and this is the original hd from it i put in a new housing. when i try to format it in disk utility it gives me an error message that says it can't unmount the drive to erase it, any clues?
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Formating external usb 2 drive
- Thread starter mashinhead
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Worst case? Reboot and all should be well. An application or file from that drive is probably in use.