I would like to use a tool like
deja-dup or similar to have backups of certain directories in a virtualbox Ubuntu 12.04 machine that runs on a Windows 7 host laptop. I am plugging and unplugging this laptop quite often during the day, so ideally this system would be able to auto-mount the USB disk and would not break if I unplug it midway of a backup operation. I have been pointed to
rsync --partial as a solution, but it seems there isn't a prepackaged solution to the problem so far.
Here is what I found:
BUP to do incremental backups of virtual machines:
This would allow me to back up the Linux virtual machine itself, but I would still want to at the same time copy some of the contents inside the virtual machine for extra safety.
Incremental backups to an external disk:
It doesn't mention partial backups being interrupted midway.