I would like to suggest an option to backup the header of encrypted disks. Currently if something catastrophic was to happen to a disk and just screw up the headers - the data would be irretrievable. While I know a solid backup strategy should be utilized - there are scenarios wherein a simple recovery of the header could void the need for restore from backups. This can result in a quicker/easier time in restoring data on an encrypted disk. It's also possible that this could be used to simply get a system back up and running. 

Actually had my header info lost on a drive not long after migrating data due to a power loss I believe and lost about half the data on the drive.  This would be very much appreciated.