Re: How to debug 'out of disk' error.

[Grégoire Sutre]

On 03/16/2011 20:19, Phillip Susi wrote:
> On 3/16/2011 1:32 PM, Lennart Sorensen wrote:
> > So I now have some debug info:
> >
> > version=48
> > total_sectors=156312576 C=16383 H=16 S=63
> > error: hd0,msdos1 out of disk.
> > Entering rescue mode...
> > grub rescue>
> >
> > So version is returning something, and it is actually getting the disk
> > size properly.  I wonder what else could cause the out of disk message
> > then.
>
> What does the partition table look like?  It doesn't extend beyond
> sector 156312575 does it?
>
> Also I wonder about why H=16.  It should be 255.

I didn't look at the code, but this is probably the ATA geometry of
the disk, which is returned by the INT-13h (Extended) function 48h
(Read Drive Parameters).  If I remember correctly, this geometry is
always 16383/16/63 for disks larger than 8.4GB.

Grégoire