On Thu, Oct 24, 2013 at 3:34 AM, Tom H <tomh0...@gmail.com> wrote:
> On Thu, Oct 24, 2013 at 4:02 AM, Mark Phillips
> <m...@phillipsmarketing.biz> wrote:
> > On Wed, Oct 23, 2013 at 6:10 AM, Tom H <tomh0...@gmail.com> wrote:
> >> On Wed, Oct 23, 2013 at 3:54 AM, Mark Phillips
> >> <m...@phillipsmarketing.biz> wrote:
> >>>
> >>> I ran apt-get update and apt-get upgrade this morning on an old server
> >>> (Debian Squeeze) and the system won't boot now. I get the error
> >>>
> >>> kernel panic not syncing: VFS: unable to mount root fs on unknown
> >>> -block(0,0)
> >>>
> >>> One of the updates was to kernel 2.6.32-5-686. I can boot in to safe
> >>> mode with this kernel, and the upgrade wiped out the older version of
> the
> >>> kernel.
> >>>
> >>> I have googled for possible solutions, but nothing helpful is popping
> >>> up. I am also running grub, and not grub2, but that is OK for this
> kernel
> >>> according to debian.org.
> >>
> >> Are the "root" and "kernel" lines of the regular and recovery lines
> >> diffeent (other than the recovery kernel line having "single" added)?
> >
> > Yes, I looked in /boot/grub.cfg and the lines for the menu entries for
> both
> > normal boot and recovery mode are identical except regular boot says
> quiet
> > and recovery says single.
> >
> > Still can't get it to boot.
>
> Please bottom-post.
>
> Since you're using grub1, I hope that you mean "/boot/grub/menu.lst".
> "grub.cfg" is grub2's menu configuration file and it's in
> "/boot/grub/".
>
> I'm having trouble understanding how you can mount "/" when booting
> with "single" and cannot mount "/" when you boot without it since the
> same initramfs is used for both (unless your "initrd" lines in
> "menu.lst" are different in the regular and recovery cases).
>
> Tom,
Sorry about the top posting...gmail made me do it! ;)
I am very confused at this point. I guess I do have grub2 installed, as I
do not have a menu.lst, but only /boot/grub/grub.cfg.
For completeness, my grub.cfg:
root@hammerhead:/home/mark# cat /boot/grub/grub.cfg
#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#
### BEGIN /etc/grub.d/00_header ###
if [ -s $prefix/grubenv ]; then
load_env
fi
set default="0"
if [ "${prev_saved_entry}" ]; then
set saved_entry="${prev_saved_entry}"
save_env saved_entry
set prev_saved_entry=
save_env prev_saved_entry
set boot_once=true
fi
function savedefault {
if [ -z "${boot_once}" ]; then
saved_entry="${chosen}"
save_env saved_entry
fi
}
function load_video {
insmod vbe
insmod vga
insmod video_bochs
insmod video_cirrus
}
insmod part_msdos
insmod ext2
set root='(hd0,msdos1)'
search --no-floppy --fs-uuid --set 2de70949-fd34-49d0-98e7-3bcfedff81e8
if loadfont /usr/share/grub/unicode.pf2 ; then
set gfxmode=640x480
load_video
insmod gfxterm
fi
terminal_output gfxterm
insmod part_msdos
insmod ext2
set root='(hd0,msdos1)'
search --no-floppy --fs-uuid --set 2de70949-fd34-49d0-98e7-3bcfedff81e8
set locale_dir=($root)/boot/grub/locale
set lang=en
insmod gettext
set timeout=5
### END /etc/grub.d/00_header ###
### BEGIN /etc/grub.d/05_debian_theme ###
set menu_color_normal=cyan/blue
set menu_color_highlight=white/blue
### END /etc/grub.d/05_debian_theme ###
### BEGIN /etc/grub.d/10_linux ###
menuentry 'Debian GNU/Linux, with Linux 2.6.32-5-686' --class debian
--class gnu-linux --class gnu --class os {
insmod part_msdos
insmod ext2
set root='(hd0,msdos1)'
search --no-floppy --fs-uuid --set 2de70949-fd34-49d0-98e7-3bcfedff81e8
echo 'Loading Linux 2.6.32-5-686 ...'
linux /boot/vmlinuz-2.6.32-5-686
root=UUID=2de70949-fd34-49d0-98e7-3bcfedff81e8 ro quiet
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-2.6.32-5-686
}
menuentry 'Debian GNU/Linux, with Linux 2.6.32-5-686 (recovery mode)'
--class debian --class gnu-linux --class gnu --class os {
insmod part_msdos
insmod ext2
set root='(hd0,msdos1)'
search --no-floppy --fs-uuid --set 2de70949-fd34-49d0-98e7-3bcfedff81e8
echo 'Loading Linux 2.6.32-5-686 ...'
linux /boot/vmlinuz-2.6.32-5-686
root=UUID=2de70949-fd34-49d0-98e7-3bcfedff81e8 ro single
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-2.6.32-5-686
}
### END /etc/grub.d/10_linux ###
### BEGIN /etc/grub.d/20_linux_xen ###
### END /etc/grub.d/20_linux_xen ###
### BEGIN /etc/grub.d/30_os-prober ###
### END /etc/grub.d/30_os-prober ###
### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries. Simply type
the
# menu entries you want to add after this comment. Be careful not to change
# the 'exec tail' line above.
### END /etc/grub.d/40_custom ###
### BEGIN /etc/grub.d/41_custom ###
if [ -f $prefix/custom.cfg ]; then
source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###
root@hammerhead:/home/mark#
The only changes I have made to the system was to boot into recovery mode,
and then do a shutdown -n how. I then tried to reboot into normal mode and
it booted without any error messages! I have tried about 5 reboots and they
all succeeded without any errors or failures.
Everything is back up and running.
Gremlins......
Thanks for your help!
Mark
