6 Replies Latest reply: Nov 24, 2007 10:01 AM by GH
GH Level 2 Level 2 (390 points)
When you back up everything with Time Machine on an external GUID formatted drive, will you be able to boot from that drive? I am using a new iMac.

GH

aluminum imac, Mac OS X (10.4.10)
  • Topher Kessler Level 6 Level 6 (9,750 points)
    No. The directory structure is not set up to be booted from. The files are all in the backups.backupdb folder instead of residing at the root of the drive where they should.
  • Roger Wilmut1 Level 9 Level 9 (71,360 points)
    When you back up everything with Time Machine on an external GUID formatted drive, will you be able to boot from that drive?


    No: but you can boot from the Install disk and then make use of Time Machine to restore. if you want a bootable drive as such (and it's worth having one) you will have to use something like SuperDuper.
  • GH Level 2 Level 2 (390 points)
    Can I not just install Leopard on the External Drive??

    GH
  • Topher Kessler Level 6 Level 6 (9,750 points)
    You can, and it will boot, but remember that as Time Machine fills up the drive you will run out of space for virtual memory on that drive, so booting and running apps from it will become sluggish. This will happen when your free space on the drive drops to ~10GB or so.
  • nerowolfe Level 6 Level 6 (13,070 points)
    Roger Wilmut1 wrote:
    When you back up everything with Time Machine on an external GUID formatted drive, will you be able to boot from that drive?


    No: but you can boot from the Install disk and then make use of Time Machine to restore. if you want a bootable drive as such (and it's worth having one) you will have to use something like SuperDuper.


    SuperDuper is not yet fully Leopard compliant. Supposedly CCC is
  • GH Level 2 Level 2 (390 points)
    Thanks. I see. I now have 33G left in my external and I imagine a new system would take up 4Gigs or so I wonder it is worthwhile to install a system. It looks like one should have a huge external to get the benefits of storage with Time Machine and bootability.

    GH