[solved] Re: grub2 and ext4

[Micha Feigin <michf@post.tau.ac.il>]

Sorry, turns out it was my bad. There was the wrong kernel installed in the
main partition, it was an xfs kernel instead of a ext4 kernel.

bottom line if anyone is interested. grub2 works with an ext4 root, you need a
kernel with ext4 support (2.6.28 at least) in that partition, one that does xfs
only will not work ;-)

On Thu, 1 Jan 2009 21:29:49 +0200
Micha Feigin <michf@post.tau.ac.il> wrote:

> turns out the issue is ext4 which doesn't work with grub, but it does with
> grub2. The problem is that the kernel seems to miss read the partition.
> 
> I setup another partition to rescue my system so now I have
> sda1: ext4 - original system
> sda5: ext3 - small rescue system
> 
> grub2 installed on both (current is suppoesed to boot from sda1)
> 
> if I set in grub
> set root=(hd0,5)
> linux /boot/vmlinuz-2.6.28 root=/dev/sda1 ro
> 
> everything works fine
> 
> If I set
> set root=(hd0,1)
> linux /boot/vmlinuz-2.6.28 root=/dev/sda1 ro
> 
> I get a kernel panic: couldn't load root file system tried: xfs
> 
> any idea on how I can get the kernel to recognize that it has ext4 file system
> so that I can dump the rescue partition (i.e make the first option work)?
> 
> Thanx
> 
> 
> On Thu, 1 Jan 2009 13:22:32 +0200
> Micha Feigin <michf@post.tau.ac.il> wrote:
> 
> > After the last update grub started booting into the command line (shows
> > grub> ) and seems to ignore menu.lst. I managed to boot by setting
> > kernel /boot/vmlinuz-2.6.28
> > boot
> > I then tried to reinstall the kernel hoping that it would fix grub but now
> > when I try the same method to boot I get the error
> > Invalid or unsupported executable format
> > The drive is formated to ext4. grub worked after that but maybe the kernel
> > was written in a different method now?
> > 
> > any ideas?
> > 
> > thanks
> > 
> > 
> 
>