I've been backing up to a 4GB usb drive.After upgrading to 11.10 I got "no space left" error in deja-dup. I deleted the cache file, but that didn't help. Since my home folder is < 4 GB, I thought I'd try to reformat the drive. Couldn't do that in ubuntu, because a backup drive is "in use" as soon as it's mounted. So I reformatted the drive on my windows machine,and then I was able to make a new back-up.
closed as not a real question by Florian Diesch, Bruno Pereira, Takkat, Nathan Osman, htorque Jan 1 '12 at 12:54
It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.