>> I tried your suggestion, but it can't even start linux in single mode. >> I think that there is a mount problem, but I have double checked the >> fstab >> file seated on the backup drive and it seems fine to me. Therefore I >> can't >> understand what prevents the mount to be made properly. Would the vmlinuz >> or >> initrd images be dependent of the md or hd filesystem type or are they >> exactly the same for both ? Else what other file should I touch that >> involves the mounting operation ? > >If you boot the install CD in rescue mode, does it find the >installed system correctly and mount it under /mnt/sysimage? >You mentioned an attempt to set up md devices before - are >the partition types set to ext3 in fdisk? Are you sure >you have the correct contents in /boot/grub/grub.conf >(the one in /etc is a symlink that can be broken if >things aren't mounted as expected when you modify it). > >-- > Les Mikesell > lesmikesell@xxxxxxxxx Hello, Les. Yes, I can run linux in rescue mode with the CD and see the correct root partition. I have also checked the contents of the /boot/grub/grub.conf and it is ok. In fstab I have also put ext3 for that backup disk. below are my important files on the backup disk: The output of the boot sequence output is the following: Mounting sysfs Creating /dev Starting udev Loading raid1.ko module md: raid1 personnality registered as nr 3 Loading jbd.ko module Loading ext3.ko module md: Autodetecting RAID arrays. md: autorun ... md: ... autorun DONE. md: Autodetecting RAID arrays. md: autorun ... md: ... autorun DONE. md: Autodetecting RAID arrays. md: autorun ... md: ... autorun DONE. Creating root device Mounting root filesystem kjournald starting. Commit interval 5 seconds EXT3-fs: mounted filesystem with ordered data mode. mount: error 2 mounting none Switching to new root SElinux: Disabled at runtime SElinux: Unregistering netfilter hooks Then, it hangs here undefinitely. Here is my menu.lst grub file on the backup disk I want to boot from: default=0 timeout=5 splashimage=(hd0,0)/grub/splash.xpm.gz hiddenmenu title CentOS (2.6.9-11.106.unsupported) root (hd0,0) kernel /vmlinuz-2.6.9-11.106.unsupported root=/dev/hda3 initrd /initrd-2.6.9-11.106.unsupported.img Here is it's fstab: none /dev/pts devpts gid=5,mode=620 0 0 none /dev/shm tmpfs defaults 0 0 none /proc proc defaults 0 0 none /sys sysfs defaults 0 0 /dev/hda1 /boot ext3 defaults 0 0 /dev/hda2 swap swap defaults 0 0 /dev/hda3 / ext3 defaults 0 0 /dev/fd0 /media/floppy auto pamconsole,exec,noauto,managed 0 0 Thanks for any idea ! Regards, Daniel