Re: Windows,grub and grub2

[Bean]

On Mon, Sep 1, 2008 at 9:53 PM, Viswesh S <address@hidden> wrote:
>
>
> ----- Original Message ----
> From: Bean <address@hidden>
> To: The development of GRUB 2 <address@hidden>
> Sent: Monday, 1 September, 2008 6:32:28 PM
> Subject: Re: Windows,grub and grub2
>
> On Mon, Sep 1, 2008 at 6:48 PM, Viswesh S <address@hidden> wrote:
>>
>>
>
> Hi,
>
> I doubt that this is caused by int 13, as grub2 doesn't change it.
> Besides, the boot sector is read properly in grub2, so int 13 should
> be working.
>
> I have thought of another possible reason for this. In grub2, %dh is
> 0, perhaps it should be set to the partition number. Please test if
> the new patch works.
>
> --
> Bean
>
> Hi,
>
> To get more insight and see whether the values are proper,I dumped the
> structure members.
>
> So for the commands:
>
> set root=(hd0,1)
> chainloader +1
>
> This is disk and partition strucure member values.
>
> disk->name=(hd0,1)
> disk->has_partitions=1
> disk->id=0x80
>
> For the partition p,
>
> p->offset=0
> p->index=0
> p->data=0
> p->start=0x3f
> p->len = 0x0
> p->offset=0x4e1edec
> p->partmap->name=(null)
> part_addr=0x7be
>
> And this is the dump from the mbr:
>
> 000001b0   00 00 00 00 00 00 00 00     81 eb 09 00 00 00 80 01
> |................|
> 000001c0   01 00 07 fe  ff ff 3f 00          00 00 ec ed e1 04 00 fe
> |......?.........|
> 000001d0   ff ff 07 fe ff ff 00 f0               e1 04 00 18 30 0b 00 fe
> |............0...|
> 000001e0   ff ff 82 fe ff ff cf 0e               12 10 33 91 3b 00 00 fe
> |..........3.;...|
> 000001f0    ff ff 83 fe ff ff 02 a0              4d 10 bf ea 53 02 55 aa
> |........M...S.U.|

Hi,

Perhaps you can dump the biosdisk information as well

#include <grub/machine/biosdisk.h>

...

struct grub_biosdisk_data *data = (struct grub_biosdisk_data *) dev->disk->data

then print its members (drive, cylinders, heads, sectors, flags).
Also, please try copy the boot sector to a file and chainload it.


-- 
Bean