[SOLVED] grub-rescue> during each boot

[darkduck]

Hi,
After some manipulations with my system (I don't understand which in particular) I have

error: unknown filesystem
grub-rescue>

prompt during the system boot.
I tried commands taken from Grub2 wiki page

set prefix=(hd0,7)/boot/grub
set root=(hd0,7)
insmod /boot/grub/linux.mod
linux /vmlinuz root=/dev/sda7
initrd /initrd.img
boot

System (Kubuntu based on sda7) boots OK. I am writing from this system now.
I can boot Ubuntu from sda6 the same way.
I ran sudo grub-update after booting.
But I have same grub-rescue> at next boot anyway.

I have following partitions:
sda1 - NTFS, WinXP
sda4 - FAT, WinXP restore
sda5 - linuxswap
sda6 - EXT3, Ubuntu
sda7 - EXT3, Kubuntu
sda8 - FAT32, PuppyLinux
Can it be that grub (mbr?) points to sda1 with ntfs, which is "unknown" for it? How can I check?
Any other recommendations?

PS. If required, I can put my grub.cfg here

[oshunluvr]

Re: grub-rescue> during each boot

Reboot into kubuntu using your commands again (if you haven't already) and try this:

install-grub --root-directory=/ /dev/sda

assuming: your running from /dev/sda7 and /boot/grub is not on a separate partition.

Also possible is you may have a buggy BIOS and the location of your /boot/* files is not under the 1024 cylinder boundary. Create a small partition on the beginning of the disk, mount it as /mnt/b, cp -av /boot/* /mnt/b; umount /mnt/b; mount /dev/small_partition /boot; grub-install /dev/<device>.

[darkduck]

Re: grub-rescue&gt; during each boot

Reboot into kubuntu using your commands again (if you haven't already) and try this:

install-grub --root-directory=/ /dev/sda

assuming: your running from /dev/sda7 and /boot/grub is not on a separate partition.

Also possible is you may have a buggy BIOS and the location of your /boot/* files is not under the 1024 cylinder boundary. Create a small partition on the beginning of the disk, mount it as /mnt/b, cp -av /boot/* /mnt/b; umount /mnt/b; mount /dev/small_partition /boot; grub-install /dev/<device>.

I had my system running before, so 1024 issue would not be mine.
Actually, install-grub helped, though it is grub-install in reality. At least, qemu /dev/sda shows me the right menu.
Going to reboot. Fingers crossed!


UPDATE: It works!

[oshunluvr]

Re: [SOLVED] grub-rescue&gt; during each boot

though it is grub-install in reality

Oops! :P

At least we got it!