> > Apologies, missed your post donoban. But looping the backup seems
interesting, I suppose it must be possible with the decryption too. >
Yes, it is. I backup by data that way since Q4  - the qubes-backup may
be more "handy", but I prefer knowing every single detail on encryption,
etc myself. You may mount a luks-container in sys-usb (for example), and
then attach one-by-one your app-vm private.img  to sys-usb using the
qubes widget; after mounting them (ro of course) you can simply rsync
your data, most conveniently to the backup volume. Your app-vm will not
be exposed to usb that way.

If you have a full dd take of your qubes system (I understood you inital
mail like that), be aware that the some image files are rather like "dd
disk images" rather than "dd partition images", which means you cannot
use the most straightforward mount on the loop device (you never mount a
disc, but a partition!). Instead, have to read the offset of the
partition start using fdisk or similar, and provide this offset to the
mount command. A quick google reveals the details on this procedure :)

Bernhard

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