Re: [OpenBIOS] [PATCH 3/10] Don't stop at APPLE_VOID partition

[Natalia Portillo]

APPLE_VOID partition is just a partition entry holder, so you don't have to resize the partition table but it occupies no space on disk.
APPLE_FREE however, indicates free space on disk.

This is, if my memory don't fail, on Inside Macintosh books, Volume 2 or 4.

Sorry no link I have the books in paper :p

El 10/08/2011, a las 16:28, William Hahne escribió:
> On Wed, Aug 10, 2011 at 5:50 AM, Mark Cave-Ayland  wrote:
> On 09/08/11 22:54, William Hahne wrote:
>
> The void partitions can be occasionally found on Mac OS discs (10.2 for
> example.) Previously mac-parts would just stop at the first void
> partition meaning it would never try to boot from the HFS partition.
> Index: packages/mac-parts.c
>
> --- packages/mac-parts.c (revision 1041)
> +++ packages/mac-parts.c (working copy)
> @@ -165,9 +165,12 @@
> for (parnum = 1; parnum <= __be32_to_cpu(par.pmMapBlkCnt); parnum++) {
> SEEK( bs * parnum );
> READ( &par, sizeof(par) );
> if( __be16_to_cpu(par.pmSig) != DESC_PART_SIGNATURE ||
>                        !__be32_to_cpu(par.pmPartBlkCnt) )
> if( __be16_to_cpu(par.pmSig) != DESC_PART_SIGNATURE) {
>
> break;
> }
> if ( !__be32_to_cpu(par.pmPartBlkCnt) ) {
> continue; /* Just a void partition, ignore it. */
> }
>
> DPRINTF("found partition type: %s with status %x\n", par.pmPartType,
> __be32_to_cpu(par.pmPartStatus));
>
> Same as my comment for patch 2/10.
>
> This was also found through testing although I would assume it is documented. If you have a 10.2 disc (or I would assume most other early Mac OS X discs) lying around you can look at the partition table and see the void partitions.
>
> William Hahne
>
> ATB,
>
> Mark.
>
> Sirius Labs: http://www.siriusit.co.uk/labs

[PATCH 3/10] Don't stop at APPLE_VOID partition

[Mark Cave-Ayland]

On 10/08/11 23:11, Natalia Portillo wrote:
> APPLE_VOID partition is just a partition entry holder, so you don't have
> to resize the partition table but it occupies no space on disk.
> APPLE_FREE however, indicates free space on disk.
>
> This is, if my memory don't fail, on Inside Macintosh books, Volume 2 or 4.
>
> Sorry no link I have the books in paper :p

Again, in this case I think this would be fine with an updated commit 
comment pointing towards these references.

ATB,

Mark.

P.S. Natalia - am I right in thinking from the comments that you are 
William's GSOC mentor?

[PATCH 3/10] Don't stop at APPLE_VOID partition

[Natalia Portillo]

El 15/08/2011, a las 13:14, Mark Cave-Ayland escribió:
> On 10/08/11 23:11, Natalia Portillo wrote:
> > APPLE_VOID partition is just a partition entry holder, so you don't have
> > to resize the partition table but it occupies no space on disk.
> > APPLE_FREE however, indicates free space on disk.
> >
> > This is, if my memory don't fail, on Inside Macintosh books, Volume 2 or 4.
> >
> > Sorry no link I have the books in paper :p
>
> Again, in this case I think this would be fine with an updated commit comment pointing towards these references.
>
> ATB,
>
> Mark.
>
> P.S. Natalia - am I right in thinking from the comments that you are William's GSOC mentor?

Btw I don't check this ML daily.

Yeeeeeeeeees I'm William's mentor.

(And I have my own HFS driver so I know about it :p)
> Sirius Labs: http://www.siriusit.co.uk/labs