Finally found out how to make DSL-embedded persistent across boots. The help page doesn't mention that you have to actually run the goddamned backup, it makes it sound as though it's all automatic. It isn't. The restore, however, is.
To run the backup, you have to tell it the backup device, without the /dev.
That's nonobvious, too. Right-click, System, Backup-Restore, type sda1
(typically for booting via USB, anyway), and click Backup. Or, from the root
command line, run
last updated 2013-01-10 21:07:33. served from tektonic.jcomeau.com