xfs_repair /dev/md0 fsck /dev/md1
Check the file system and the re-install the bootloader Request the rescue-system and then a hardware-reset. Connect to the rescue system. Possible to mount the RAID? # mount /dev/md1 /mnt Yes. Do a file system check (first umount the file system): # ummount /mnt # fsck /dev/md1; Shows some (many) errors. Fixed them by staying on the "y" key. Could use the auto repair option of fsck (-y). Re-Install the bootloader This is a Hetzner installimage-setup, so there should be a grub bootloader. Check for the /boot/grub/ folder. Again mount the RAID. # mount /dev/md1 /mnt # ls /mnt/boot/grub It is there, so there is a good chance, that the bootloader is grub, not lilo. Now re-install grub on the disk. Actually on both disks, just in case one is missing. Make a chroot environment: # mount /dev/md1 /mnt # mount -t none -o bind /dev /mnt/dev # mount -t proc -o bind /proc /mnt/proc # mount -t sysfs -o bind /sys /mnt/sys # chroot /mnt Grub: # grub Look for the file stage1 to find the boot partitions grub> find /grub/stage1 (hd0,1) (hd1,1) Install the bootloader on both partitions. Both are regarded as hd0 from the point of view of the bootloader at boot time. grub> device (hd0) /dev/sda device (hd0) /dev/sda grub> root (hd0,1) root (hd0,1) Filesystem type is ext2fs, partition type 0xfd grub> setup (hd0) setup (hd0) Checking if "/boot/grub/stage1" exists... yes Checking if "/boot/grub/stage2" exists... yes Checking if "/boot/grub/e2fs_stage1_5" exists... yes Running "embed /boot/grub/e2fs_stage1_5 (hd0)"... 17 sectors are embedded. succeeded Running "install /boot/grub/stage1 (hd0) (hd0)1+17 p (hd0,1)... succeeded Done. The same for the other disk grub> device (hd0) /dev/sdb grub> root (hd1,1) grub> setup (hd0) grub> quit And reboot - works.