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-   -   Can you boot from a disk image on a Firewire drive (https://www.shirt-pocket.com/forums/showthread.php?t=1790)

caek 11-15-2006 03:41 PM

Can you boot from a disk image on a Firewire drive
 
I know that a suitably "blessed" external Firewire drive can be used by a Mac to boot with a key-press during bootup.

However, can a blassed disk image kept on an external firewire drive, such as those created by SuperDuper also be used to boot from? For extra credit, can the disk image be encrypted/password protected?

I ask because I finally have access to an external hard drive several times the capacity of my Macs, and would like to implement a rotating snapshot backup system.

Many thanks in advance.

dnanian 11-15-2006 03:47 PM

No, you cannot boot directly from an image. You can, however, create a sparse image that's encrypted and then choose it as the destination of a backup.

caek 11-15-2006 03:56 PM

Quote:

Originally Posted by dnanian (Post 9366)
No, you cannot boot directly from an image. You can, however, create a sparse image that's encrypted and then choose it as the destination of a backup.

Thanks for the quick reply! So the best way to create a rotating backup system, with all the clones bootable, is to partition the external drive into partitions as big as the internal drive?

caek 11-15-2006 03:58 PM

Also, if you're backing up to a [encrpyted] disk image, is there any reason why you would tick the option in SuperDuper to make the disk bootable?

dnanian 11-15-2006 04:02 PM

There is no option to make the disk bootable: we always make the image bootable if possible. Note that "bootable" doesn't mean "it'll boot"!

But -- once restored to a device that supports boot, it'll boot...

dnanian 11-15-2006 04:02 PM

That's certainly what I'd suggest (partitioning).

caek 11-15-2006 04:04 PM

Thanks! That answers both my questions, and incredibly quickly! One purchase, coming your way.

dnanian 11-15-2006 04:08 PM

Glad I could help.


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