[SOLVED] after system crash system hangs in grub

[magfan]

After a system crash my mga4 system does not boot any more. It simply stops in grub. I have no idea what might have gone wrong and how I could try to start the system from the grub command line. If I type now "find /boot/grub/stage1" at the promt grub gives me "(hd0,1)". But since I do only have an internal SAS-RAID I am expecting something like "(sd0,1)". Any ideas how I could solve this problem?

[filip]

Note that Grub use different nomination (in some cases even numeration) of hard drives then the kernel .

[doktor5000]

If I type now "find /boot/grub/stage1" at the promt grub gives me "(hd0,1)". But since I do only have an internal SAS-RAID I am expecting something like "(sd0,1)".

Since when does grub differentiate between hd and sd ?

Apart from that, did you try to boot that, as it seems the only thing that grub can find? Only other option would be some live medium.

[unklar]

You can try the following commands

Code: Select all

grub> root (hd0,1)                    Enter
grub> configfile /boot/grub/menu.lst  Enter
grub> boot                            Enter

or

grub> root (hd0,1)
grub> kernel /boot/vmlinuz-desktop root=/dev/sda2   << if mga4  /
grub> initrd /boot/initrd-desktop.img               
grub> boot

[magfan]

Thank you both! It was much easier than expected.

@doktor5000

Since when does grub differentiate between hd and sd ?

Well, it does not but I did not know that. Somehow I was simply sure...

@unklar

grub> root (hd0,1) Enter
grub> configfile /boot/grub/menu.lst Enter
grub> boot Enter

This worked perfectly!