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I have made a clone of a webserver system disk (Debian 8) using Clonezilla. On booting I got this error:

No OS Found

All the files seemed fine and the problem turned out to be the MBR. The disk originally had a different distro on it. Although Clonezilla reported that it had copied the MBR over, the old MBR remained. I replaced the MBR using Debian Rescue and the system booted but the root partition mounts readonly. The fstab mount option is errors=remount-ro, fsck reports the partition as Clean.

This then causes randon-seed and UTMP failures.

Where should I be looking for the error?

  • No fsck errors, all mountpoints there? Can you add more technical details? – Rui F Ribeiro Mar 15 '18 at 12:43
  • Have you tried mount -o remount,rw /dev/sda / (assuming root is on /dev/sda...) – Helio Mar 15 '18 at 14:18
  • Already done that but it doesn't fix anything in the boot process, still mounts ro – Sabreur Mar 16 '18 at 9:04
  • What details would you like. @RuiFRibeiro – Sabreur Mar 16 '18 at 9:09
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Check your /etc/fstab, it often contains UUID's. There's a program called blkid which allows you to retrieve those of partitions of the clone.

  • Clonezilla made a dogs dinner of the UUID translation, it translated the root uuid ok but left the swap uuid from the source drive, I corrected it manually after a 'remount-ro – Sabreur Mar 16 '18 at 9:07
  • I've never managed to get the UUID's working, perhaps because I always compile my own kernel. I always replace them in my /etc/fstab by the old "/dev/sdx". And I lived happily ever after. – Gerard H. Pille Mar 16 '18 at 9:33

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