VE F5 13.1 Proper back up and restore procedure.

For a VE, the most comprehensive DR backup would be at the VMWare level. By taking a copy of the VM itself (OVA) and exporting it out, you're backing up everything. Your DR recovery therefore is simply re-importing the VMWare image. (Disk and Config). Effectively you're creating your very own 'appliance' complete with 'base config' (Being all your config). As an OVA it's 1 file (A tar of the ovf files) so easy to keep and copy around (Although may be quite large).

Everything else would require you to be able to re-create the VM guest before you can reinstall and be up & running again. e.g. if you rely on UCS then in DR you still have to create a new guest, install bigip and reload your config. That's downtime you may not be able to handle.