Re: [Hubert Tonneau <address@hidden>] GRUB does not recognize ext2 RAID 1

[Christoph Plattner]

Hello GRUB people,

        I think, the file systems on the partitions shoud be
checked via magics and other things on the partition, not via
the ID byte in the partition table.

For <TAB> expansions on positions like `(hd0,<TAB>' GRUB can
output the ID byte together with a `guess' by ID->name, or also
here the partition contents is checked by magics etc...

Is this possible, or is this not a good idea.
We should discuss.

Cheers
        Christoph P.


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Gordon Matzigkeit wrote:
> 
> FYI.
> 
>   ------------------------------------------------------------------------
> 
> Subject: GRUB does not recognize ext2 RAID 1
> Date: Fri, 09 Feb 2001 09:02:38 GMT
> From: Hubert Tonneau <address@hidden>
> To: address@hidden
> 
> When I set the root ext2 partition over RAID 1 (what I now do on all
> my servers because software RAID using 2 IDE disks is so cheap), then
> the type of the partition has to be FDh instead if 83h so that Linux
> kernel software RAID 0.90 will find the partitions even if the disk
> changed of name because a previous one is down.
> 
> The problem is that GRUB will not recognize such a partition as ext2,
> so it will refuse to load a kernel on it.
> Should be fairly easy to fix through simply assuming that FDh is the
> same as 83h, even if it's not always true (true only if it holds a
> RAID 1 set, as opposed to RAID 5 and others).
> 
> I think it is possible to specify two boot sequences to GRUB, so GRUB
> would be abble to boot the kernel even if the first disk in the RAID 1
> set is down, what LILO will not do (as far as I know).
> 
> Regards,
> Hubert Tonneau
> 
>   ------------------------------------------------------------------------
> 
> --
>  Gordon Matzigkeit <address@hidden>  //\ I'm a FIG (http://fig.org/)
> Committed to diversity and freedom \//  Run Bash (http://fig.org/gnu/bash/)