Re: hfs+ resize gone pear shaped

[K.G.]

Hi David,

On Fri, 11 Nov 2005 15:05:18 +1030 David Purton <address@hidden> wrote:
 
> I've have attempted to resize and hfs+ partition in order to install OSX
> 10.4 alongside and existing 10.3 install.
> 
> Sadly I think I have learnt too late how to do ths, but maybe it is
> possible to repair things. Any suggestions appreciated.
> 
> This is what I did:
> 
> I had a single 40GB hardrive with a single hfs+ partition running OSX
> 10.3
> 
> I used an ubuntu breezy live ppc CD to boot. I then grabed debs of the
> lates version of parted and unpacked them. Fixed up library paths so
> that all was good.
> 
> ran parted and attempted to resize the partition.
> 
> It *nearly* worked, but then right at the end I got a fatal: out of
> memory error.
 
Waouh, it should not happen, but this is the second time we got such a
report...

I really want to completely understand what happened to fix anything
that could be broken.

What was the version of the first Parted you used ?

> I booted back into OSX to see the damage.
> 
> The partition is still listed as 40GB, with 15GB used, but 0 Bytes free.
> 
> I then grabed the latest debian ppc net install image (probably should
> have done this first - you always learn these things too late :( ).
> 
> I ran parted again and made a second attempt to resize the partition
> down to 30GB. I then created a new partition in the freed up 10GB.

All right, what is the version of this second Parted you used ?

> It worked, but the 30GB parition still reports 0Bytes free. and no more
> can be written to it. (Deleting data does free up space)

I think the free space field has been miscalculated, probably because
it hasn't been updated during the first crash or something.

We have a special build that is able to extract HFS file system structures
in some files, you can download it at
http://projetos.ossystems.com.br/~otavio/test/parted/static-ppc
Under Linux, put it under a directory you can write too (for exemple
mount the Os X 10.4 volume RW, or use another drive if available),
"cd" to that directory, set it executable ( chmod +x static-ppc ) and
run it using your drive that has the 10.3 volume on it. Then use the
"check" command on the 10.3 broken partition. It a false check that
will extract your file system structures in various files.

For analysis :
 * I'll need at least mdb.hfs if it exists, and vh.hfsplus.
 * I won't need bitmap*
 * catalog* and extents* are probably quite big, but if they
   compress well you can send them too (i don't think they'll
   be useful but who know?)
optional:
 * I would appreciate attributes.hfsplus and startup.hfsplus
   for unrelated reason if they exists, are small enough or
   compress well.

> I then installed OSX 10.4 on the 10GB partition and it boots and works.

At least one thing works ;)

> So the question that I need to know the answer is:
> 
>     Can I get back the other 15GB on the other partition or is it lost
>     for ever?

Probably...

>     If so how?

I need to study your file system structures extracted with
the special build of parted as explained above.
Maybe checking and reparing the volume with disk utils
under OS X will help, but i'm not 100% sure, so if you
can send me your file system it would be the best.

Cheers,
Guillaume Knispel