It happens I have rebooted, and the problem wrt that particular disk image now does not occur.
The file did, in fact, exist; I've changed the way I pass data to my new guests and now do not use a floppy image, so I used to commands I already showed you in order to recreate the problem. Previously, I expanded the allocated size of the file using a dd command similar to this: dd if=/dev/zero of=/var/lib/libvirt/images/fd1440a.img seek=1 bs=2G count=0 and the problem went away. Since that it now does not go away that way, I expect I must have done something else as well, lile restart libvirtd. Since the message, "ValueError: Size must be specified for non existent volume path '/var/lib/libvirt/images/fd1440a.img'" is clearly misleading because the ls command (which is the obvious way to check) reveals the file does exist. I suggest that libvirtd (or whatever is the offending code) be changed to ask the filesystem whether the file exists (stat() and/or access()) and that the error reporting be improved to more accurately reflect the actual problem. Thanks for your time. -- John Summerfield -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org