I have set up a server acording to How To Set Up Software RAID1 On A Running LVM System and it works fine to start normaly but when I test to start it with only one disk I get a problem. When I start it from one of my disks (sda) I can start in Degraded mod and after a restart and connecting the other disk mount the other hardisk, then it is OK. But when I start it from the other disk (sdb) it does not work. I get this: grub rescue no such device 52a5fd6-... and so. The number is the UUID that i have a # before in fstab. It looks as grub has different files on the disks. I have done this: grub-install /dev/sda grub-install /dev/sdb Here is my files. mdadm.cfg # mdadm.conf # # Please refer to mdadm.conf(5) for information about this file. # # by default, scan all partitions (/proc/partitions) for MD superblocks. # alternatively, specify devices to scan, using wildcards if desired. DEVICE partitions # auto-create devices with Debian standard permissions CREATE owner=root group=disk mode=0660 auto=yes # automatically tag new arrays as belonging to the local system HOMEHOST <system> # instruct the monitoring daemon where to send mail alerts MAILADDR root # definitions of existing MD arrays # This file was auto-generated on Sun, 04 Mar 2012 11:51:14 +0100 # by mkconf $Id$ ARRAY /dev/md0 level=raid1 num-devices=2 UUID=2d2b37df:2feded7d:f3eca3b8:8dd14187 ARRAY /dev/md1 level=raid1 num-devices=2 UUID=bbca8913:3dfba770:f3eca3b8:8dd14187 fstab: # <file system> <mount point> <type> <options> <dump> <pass> proc /proc proc nodev,noexec,nosuid 0 0 /dev/mapper/webb6-root / ext4 errors=remount-ro 0 1 # /boot was on /dev/sda1 during installation #UUID=52a5fd61-2696-49cd-8118-ca315a15a29d /boot ext2 defaults 0 2 /dev/md0 /boot ext2 defaults 0 2 /dev/mapper/webb6-swap_1 none swap sw 0 0 mtab: /dev/mapper/webb6-root / ext4 rw,errors=remount-ro 0 0 proc /proc proc rw,noexec,nosuid,nodev 0 0 none /sys sysfs rw,noexec,nosuid,nodev 0 0 none /sys/fs/fuse/connections fusectl rw 0 0 none /sys/kernel/debug debugfs rw 0 0 none /sys/kernel/security securityfs rw 0 0 none /dev devtmpfs rw,mode=0755 0 0 none /dev/pts devpts rw,noexec,nosuid,gid=5,mode=0620 0 0 none /dev/shm tmpfs rw,nosuid,nodev 0 0 none /var/run tmpfs rw,nosuid,mode=0755 0 0 none /var/lock tmpfs rw,noexec,nosuid,nodev 0 0 none /lib/init/rw tmpfs rw,nosuid,mode=0755 0 0 /dev/md0 /boot ext2 rw 0 0 /boot/grub/grub.cfg: # # DO NOT EDIT THIS FILE # # It is automatically generated by /usr/sbin/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 recordfail { set recordfail=1 if [ -n ${have_grubenv} ]; then if [ -z ${boot_once} ]; then save_env recordfail; fi; fi } insmod raid insmod mdraid insmod lvm insmod ext2 set root='(webb6-root)' search --no-floppy --fs-uuid --set 280a3f6e-fc66-4633-bda3-385a35401aac if loadfont /usr/share/grub/unicode.pf2 ; then set gfxmode=640x480 insmod gfxterm insmod vbe if terminal_output gfxterm ; then true ; else # For backward compatibility with versions of terminal.mod that don't # understand terminal_output terminal gfxterm fi fi insmod raid insmod mdraid insmod ext2 set root='(md0)' search --no-floppy --fs-uuid --set 326cfd25-e5aa-415f-86dd-9d4077c60fe2 set locale_dir=($root)/grub/locale set lang=sv insmod gettext if [ ${recordfail} = 1 ]; then set timeout=-1 else set timeout=10 fi ### END /etc/grub.d/00_header ### ### BEGIN /etc/grub.d/05_debian_theme ### set menu_color_normal=white/black set menu_color_highlight=black/light-gray ### END /etc/grub.d/05_debian_theme ### ### BEGIN /etc/grub.d/10_linux ### menuentry 'Ubuntu, med Linux 2.6.32-33-server' --class ubuntu --class gnu-linux --class gnu --class os { recordfail insmod raid insmod mdraid insmod ext2 set root='(md0)' search --no-floppy --fs-uuid --set 326cfd25-e5aa-415f-86dd-9d4077c60fe2 linux /vmlinuz-2.6.32-33-server root=/dev/mapper/webb6-root ro quiet initrd /initrd.img-2.6.32-33-server } menuentry 'Ubuntu, med Linux 2.6.32-33-server (återställningsläge)' --class ubuntu --class gnu-linux --class gnu --class os { recordfail insmod raid insmod mdraid insmod ext2 set root='(md0)' search --no-floppy --fs-uuid --set 326cfd25-e5aa-415f-86dd-9d4077c60fe2 echo 'Läser in Linux 2.6.32-33-server ...' linux /vmlinuz-2.6.32-33-server root=/dev/mapper/webb6-root ro single echo 'Läser in initial ramdisk ...' initrd /initrd.img-2.6.32-33-server } ### END /etc/grub.d/10_linux ### ### BEGIN /etc/grub.d/20_memtest86+ ### menuentry "Memory test (memtest86+)" { insmod raid insmod mdraid insmod ext2 set root='(md0)' search --no-floppy --fs-uuid --set 326cfd25-e5aa-415f-86dd-9d4077c60fe2 linux16 /memtest86+.bin } menuentry "Memory test (memtest86+, serial console 115200)" { insmod raid insmod mdraid insmod ext2 set root='(md0)' search --no-floppy --fs-uuid --set 326cfd25-e5aa-415f-86dd-9d4077c60fe2 linux16 /memtest86+.bin console=ttyS0,115200n8 } ### END /etc/grub.d/20_memtest86+ ### ### BEGIN /etc/grub.d/30_os-prober ### if [ ${timeout} != -1 ]; then if keystatus; then if keystatus --shift; then set timeout=-1 else set timeout=0 fi else if sleep --interruptible 3 ; then set timeout=0 fi fi fi ### 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 ###
