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Re: Woody DVD problem on powerpc

On Fri, Aug 09, 2002 at 11:11:07AM +0100, Steve McIntyre wrote:
> On Fri, Aug 09, 2002 at 10:13:07AM +0200, Sven LUTHER wrote:
> >On Thu, Aug 08, 2002 at 06:34:45PM -0700, Brad Boyer wrote:
> >> Yup. The problem is that an HFS filesystem refers to allocation
> >> blocks with an unsigned 16 bit integer, so while the specification
> >> technically allows 2^32 different files, only 2^16 can actually
> >> be taking up any space, and there are a few system files taking
> >> up some of that, so in practical terms, it's a little smaller.
> >
> >I suppose HFS+ fixes this kind of problems, is it not ?
> Pass. I know (almost) nothing about HFS and HFS+. I believe that we
> need the disc to be an HFS/ISO9660 hybrid for powermacs to boot
> it. Yes?

The allocation block problem is one of the big fixes in HFS+. It uses
a 32 bit int to specify blocks. Other improvements were longer filenames,
unicode, and UNIX style permissions. An HFS volume is the easiest way
to boot most powermacs, since the defaults assume HFS.

> Maybe the answer is to fiddle with the HFS bits so we only have the
> boot / install stuff visible in the HFS volume descriptor and leave
> the rest of the files on the disc only visible through
> ISO9660/RockRidge. That way the install kernel and a running system
> will be able to see the packages on the disc just fine, but the host
> Mac system won't. I'm playing with that now to see if it will create
> an image, at least.

That should work fine, if all you're using the HFS side for is booting.

	Brad Boyer

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