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#1 2009-09-26 1:11 pm
- tjlean
- Member
- Registered: 2001-02-14
- Posts: 224
Cannot erase hard drive
I want to carbon copy my bootable external drive to my main internal bootable hard drive so I tried to use Disk Utility to erase it but it will indicate that it failed and can't unmount. When I tried to manually unmount by dragging it to the trash it indicated that it is in use. I can't understand why it's in use since I booted from the external drive which I wanted to the copy to the internal drive. Can anybody help?
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#2 2009-09-26 4:04 pm
- sturner
- Royal High Poobah
- Moderator
- From: Carrollton, TX USA
- Registered: 2000-01-31
- Posts: 13800
Re: Cannot erase hard drive
Try booting from a DVD system disc. That should ensure you aren't using ANY resources from the internal drive. Then you can erase it.
On the other hand, if you have something like Carbon Copy Cloner, then you can sync the internal to the external drive. and solve the problem in that manner.
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#3 2009-09-26 11:58 pm
- tjlean
- Member
- Registered: 2001-02-14
- Posts: 224
Re: Cannot erase hard drive
Thanks. I used the DVD system disk and it work. I guess using an external drive to boot somehow would still use some resources from the internal drive.
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