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@gmail.com
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