Re: Kernel panic after kernel update.

[Spundun Bhatt <spundun@isi.edu>]

Покотиленко Костик wrote:
> I have seem this problem on non-ia64 system.
>
> First, check which root partition the kernel is said to use (root=
> kernel option).
>
> Then watch the boot process and check how your boot HDD is being
> recognized. The most common case is when you try to boot from
> root=/dev/hda1, but your HDD is being recognized as, say, /dev/hde1.
I am watching the boot process up to the kernel panic closely but I dont 
see any HDD line, is it possible that my HDD is not detected soon 
enough? I has been working for about 2 years now, one year on this 
debian system.

Which elilo.conf file should I be examining? There is one in the boot 
partition (efi/debian/elilo.conf this is an msdos/vfat partition) and 
the other is in root partition (/etc/elilo.conf). They are both pretty 
much the same. Which one is read at boot time? Which one should I modify?

The root in both the above mentioned files was set to /dev/sda2 right 
now, and the time stamp on all the files in efi:efi/debian/* (including 
elilo.conf file) is on the same day (last friday) that I updated the 
kernel. The /etc/elilo.conf file has time stamp from 11 months back, is 
it possible that I haven't updated my kernel in a year? since booting 
used to work before friday!

The root partition when I boot through the debian sarge net install cd 
(2.6.8-2-itanium-smp) is located at /dev/discs/disc0/part2 ... but both 
the elilo.conf files have root=/dev/sda2 . I tried changing the root= 
statement to roo=/dev/discs/disc0/part2 ... but I still get the same error.

Can anyone tell me how should I proceed?
> On my system I have two IDE controllers and sometimes their recognition
> order is being changed.
>
> I have PATA HDD attached to ICH7 controller and DVD-RW to ITE8211. So,
> in normal case I have /dev/hde for my HDD and /dev/hda for DVD-RW. But
> sometimes ICH7 driver is being loaded before ITE8211, and I get them
> switched: /dev/hda for HDD and /dev/hde for DVD-RW, and I get the same
> error as you.
>
> В Вск, 02/07/2006 в 10:14 -0700, Spundun Bhatt пишет:
> > Can someone please respond to my question over here? This *is* the right 
> > forum, isn't it?
> >
> >
> > Spundun Bhatt wrote:
> > > Hi debian-ia64.
> > >
> > > I updated the kernel on my debian linux testing from 
> > > linux-image-2.6.12-1-mckinley to linux-image-2.6.15-1-mckinley .
> > >
> > > When I rebooted, I got the error saying the following (very early in the 
> > > boot).
> > >
> > > RAMDISK: Compressed image found at block 0
> > > Kernel panic - not syncing: VFS: Unable to mount root fs on 
> > > unknown-block (0,0)
> > >
> > > I suspect that the new kernel bootloader configuration is pointing to a 
> > > non-existing location for root partition...
> > >
> > > Can anyone guide me as to how to debug this problem?
> > > Also is there any literature available that will help me understand how 
> > > linux boot loader works on debian on ia64? I mean what are the packages 
> > > responsible for installing the bootloaders and where can I find the 
> > > configuration so that I can check whether its right or not, etc?
> > >
> > > Thanks a lot
> > >
> > > Spundun