On Fri, Apr 16, 2010 at 4:49 AM, Kim Eik <[email protected]> wrote: > I have been running a server for about half a year. And i have restarted the > machine countless times w/o any problems. However two days ago, grub stopped > working. > > The machine is running ubuntu server 9.10, i have two physical disks > mirrored with sw raid and several lvm partitions on top. The machine is also > running ACHI. > > I have booted the system using a usb pendrive with ubuntu-alternate, and > reinstalled grub from a chrooted environment. But sadly to no effect. > > I have also tried installing grub to the mbr of both disks and booting from > each of them. Also without any effect. > > I do however have a hunch that the fault may lie in a dist-upgrade from > somewhere between my previous successfull boot and now. So i am gonna try to > see if i can rollback some installed software and see if this fixes grub. > > Is there anything you guuys can suggest that i do? I am not very familiar > with the inner workings of grub2 so any help is appreciated. > > Thanks > -Kim > > > _______________________________________________ > Help-grub mailing list > [email protected] > http://lists.gnu.org/mailman/listinfo/help-grub >
Booting from a USB drive, or any other 'hard disk emulation mode' device will cause your bios-disk order to be detected different when running grub than it will be during a normal operation. You probably need to look in to manually editing /boot/grub/device.map (google for it) and specifying the proper bios-disk mapping. Whatever disk your bios is trying to boot off of will be hd0; there is usually no solid standard for the other devices, but they MAY be stable for a single bios version on a single system. _______________________________________________ Help-grub mailing list [email protected] http://lists.gnu.org/mailman/listinfo/help-grub
