[Fwd: Re: can I get my Apple_partition_map partition back?]

[Tom Fowler]

Dan,

Is there a way to prevent this bug from happening with a fresh install? 
  I have already been a victim once, and before I read your solution, I 
had to reformat and re-install OS X.  I would like to try again, but do 
not have the nerve to loose my stuff again after restoring from backups 
(about a day long job).

If I removed all drives from the system except for the one I want to 
install yellowdog on?  Would that prevent the error?  Probably not if 
it sets the wrong label on the drive it installs too.

Thanks in advance,

Tom Fowler
tomfowler@mac.com

On Thursday, May 1, 2003, at 01:19 AM, Dan Burcaw wrote:

> This is in reference to a problem brought up on yellowdog-general.
>
>
> From: Dan Burcaw <dburcaw@terrasoftsolutions.com>
> Date: Thu May 1, 2003  12:51:57 AM US/Eastern
> To: yellowdog-general@lists.terrasoftsolutions.com
> Subject: Re: can I get my Apple_partition_map partition back?
> Reply-To: yellowdog-general@lists.terrasoftsolutions.com
>
>
> I've updated 'pdisk' to be able to easily fix the Apple_partition_map
> issue.  Again, this issue seems to only occur on machines with two hard
> disks.  Mac OS 9 or OS X may not boot because of this problem. The gist
> is that the first partition of your (likely second hard drive) has the
> 'boot' flag toggled.  As a result, it is labled with the partition type
> "Apple_Bootstrap" instead of "Apple_partition_map".  This is due to a
> big in Anaconda, the Yellow Dog installer and the Parted partition
> program that it uses.  It will be fixed in future ISO revisions of
> Yellow Dog Linux 3.0, and future releases.
>
>
> Follow the simple instructions below to fix the problem.  You will
> need to know what Linux device the drive affected is.  E.g. /dev/hdb
>
> (Note: the following instructions assume you are logged in as
> super-user.)
>
> 1)  Type: /sbin/pdisk -l <your hard drive>
>     (e.g. /dev/hdb)
>
>     If pdisk reports partition #1 having a type of "Apple_Bootstrap",
>     please proceed to step two. Otherwise, verify that you have 
> provided
>     the correct hard drive device and try step one again.
>
> 2)  Download the pdisk update at:
>     http://stage.terraplex.com/~dburcaw/pdisk-0.8-3a.ppc.rpm
>
>     I've also pushed this update to the YDL 3.0 updates directory
>     so it should be available there soon (and via apt & yum.. although
>     apt may still be giving folks a problem.. fixes pending).
>
> 3)  Install the pdisk update by typing::
>     rpm -Uvh pdisk-0.8-3a.ppc.rpm
>
> 4)  Type: /sbin/pdisk <your hard drive>
>
> 5)  At the pdisk prompt type 'p'.
>     Example output:
>
>     Command (? for help):
>
>     Partition map (with 512 byte blocks) on '/dev/hdb'
>       #:	     type name	      length base		( size )
>       1:  Apple_Bootstrap untitled        63 @ 1
>       2:  Apple_UNIX_SVR4 unitiled  11076123 @ 64		(  5.3G)
>
>     Device block size=512, Number of Blocks=11076183 (5.3G)
>     DeviceType=0x0, DeviceID=0x0
>
>
>     Again, you should see that partition '1' has the incorrect
>     "Apple_bootstrap" type.
>
> 6) To fix this issue, type 't' at the pdisk prompt.
>    This option does NOT touch your partition data. It merely
>    relabels the partition type.
>
>    Command (? help): t
>
> 7) You will be prompted to enter a partition number, type '1'.
>
>    Partition number: 1
>
> 8) You will be prompted to enter the new partition type,
>    be sure to type "Apple_partition_map" exactly as shown,
>    without quotes.
>
>    New partition type: Apple_partition_map
>
> 9) Back at the pdisk prompt, type 'p', to make sure partition '1'
>    is now properly labeled "Apple_partition_map" with that exact case
>    and spelling.
>
> 10) Save your changes with the 'w' option.
>
>    Command (? help): w
>    Writing the map destroys what was there before. Is that okay? 
> [n/y]:y
>    pdisk: Re-read of partition table failed  (Device or resource busy)
>    Reboot your system to ensure the partition table i updated.
>
> 11) Quit pdisk to finish.
>
>    Command (? for help): q
>    [root@localhost root]#
>
>
> At this point you should be all good to go.  The 'parted' utility, 
> which
> broke like Mac OS X, due to this bug, should now work if you type:
>
> /sbin/parted <your hard drive> print
>
> Also, Mac OS X should now boot as expected.
>
>
> Regards,
> Dan
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