after upgrading to the new 4.2 release the server mounts the root partition in read only, I think the problem is the expansion of te root partition in the past
Try this command: mount -t ext4 -o rw,remount -force /dev/sda5/vg_ucs-root /
and then reboot the machine.
This has worked many times for our ucs if it was read only.
i found some solutions about this error in the web relating to UUID’s so I changend my fstab for / from /dev/mapper/vg_ucs-root to UUID=8b47f126-80f5-40ab-b0b0-d9e1f4edb824
but that also did not solve this