Comment 112 for bug 953875

I am running Ubuntu 14.04.5 LTS and the offset parameter to preserve the UUID simply does not work for me. A later version of Ubuntu on the same PC shows there is a PARTUUID for the encrypted swap partition, but this is not visible in 14.04. The UUID for the cryptswap partition is always lost after reboot of 14.04.

Reverting back to using a device ID in conjunction with the solution in Comment #22 works, but I would like to add an additional piece of helpful information. I have a multi-disk system and periodically the /dev/sd_ drive IDs re-order themselves. Normally, UUIDs would solve this problem, but we can't use a UUID in this instance. This post pointed me in the direction of a solution (https://gebloggendings.wordpress.com/2016/06/14/cryptsetup-etccrypttab-a-workaround-for-gpt-partuuid-support/). Turns out you can use the /dev/disk/by-id alias for the partition ID in /etc/crypttab, as these drive IDs are also unique, i.e. drive make, model & serial number.