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Booting from a disk image
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Junior Member
Join Date: Oct 2001
Location: Osnabrueck, North Germany
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Offline
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Hello folk,
is it possible to boot from a disk image. I want to create a disk image copy mac os x on that and then boot from it. Is that possible? I read in another thread, that someone did that, so it must be possible, but how? I can imagine that it is technical possible, but how to tell for example the open firmware to boot that image?
Greetings,
Vax
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--:: Insanity is also a state of mind ::--
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Posting Junkie
Join Date: Nov 2001
Location: Retired.
Status:
Offline
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Not possible (as far as I know) because the image unmounts on restart and can't be used as a startup disk.
Makes sense that you can't boot from an image because you need an OS to mount it in the first place...
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Occasionally Useful
Join Date: Jun 2001
Location: Liverpool, UK
Status:
Offline
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you're supposed to burn your illegal Tiger disc image to dvd. didn't you get the memo?
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"Have sharp knives. Be creative. Cook to music" ~ maxelson
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Junior Member
Join Date: Oct 2001
Location: Osnabrueck, North Germany
Status:
Offline
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Hmm, if I would have an illegal version of Tiger, I would burn it to dvd... 
But for developers it is often quite useful to test programs on a fresh installed system. For those and similar tasks it would be quite useful to be able to boot from a disk image, otherwise you need an external disk, create a partition, install, etc.
And that over and over again...
A disk image you could just create on your notebook, copy it, use it, and delete it afterwards.
It doesn't have to be illegal to be useful...
Anyway, if the open firmware would have a hfs+ reader, it could determine the position of the image file and boot it. The people from Be used something like that for booting BeOS in a disk image on a fat32 disk.
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--:: Insanity is also a state of mind ::--
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Posting Junkie
Join Date: Nov 2001
Location: Retired.
Status:
Offline
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Your best bet would be to purchase an external FW drive and use an image to restore onto that drive each time you need a "fresh" copy. Takes very little time. Or, you can set up scripts to replace the System and User folders on logout to avoid having to restore each time...
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Posting Junkie
Join Date: Dec 2000
Status:
Offline
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Your best bet is either a FireWire hard drive, as gorickey suggested, or you could partition your internal hard disk if it's large.
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Forum Regular
Join Date: Jan 2002
Status:
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What i know is that you can boot CLASSIC from a disk image, within X. But, as has been said, you can't boot into X from a disk image.
But booting Classic from an image has a side effect on dual-boot machines, which can no more boot into Mac OS9.
Vic 
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Addicted to MacNN
Join Date: Mar 2000
Location: London, UK
Status:
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Originally posted by Vax:
Anyway, if the open firmware would have a hfs+ reader, it could determine the position of the image file and boot it.
Open Firmware already has a HFS+ reader, methinks. It certainly seems to be able to read BootX from disk...
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