Re: [PATCH] IDE disks show invalid geometries in /proc/ide/hd*/geometry

Bartlomiej Zolnierkiewicz
2005-08-03T17:19:33Z

Hi,

The topic was discussed to death on linux-kernel.

Mark, you need to fix your applications and stop using /proc/ide/hd*/geometry
or/and HDIO_GET_GEO ioctl (which BTW your patch also affects).

Bartlomiej

On 8/3/05, Andre Hedrick <andre@linux-ide.org> wrote:
>
> Did you read ATA-1 through ATA-7 to understand all the variations?
>
> On Tue, 2 Aug 2005, Mark Bellon wrote:
>
> > The ATA specification tells large disk drives to return C/H/S data of
> > 16383/16/63 regardless of their actual size (other variations on this
> > return include 15 heads and/or 4092 cylinders). Unfortunately these CHS
> > data confuse the existing IDE code and cause it to report invalid
> > geometries in /proc when the disk runs in LBA mode.
> >
> > The invalid geometries can cause failures in the partitioning tools;
> > partitioning may be impossible or illogical size limitations occur. This
> > also leads to various forms of human confusion.
> >
> > I attach a patch that fixes this problem while strongly attempting to
> > not break any existing side effects and await any comments.
> >
> > mark
> >
> > Signed-off-by: Mark Bellon <mbellon@mvista.com>
> >
> >
>
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