I attempted to comment on this LOPSA blog entry about problems bundling EC2 volumes, but for some reason they haven’t approved my comment so I’m turning it into a blog entry here instead.
The problem is that sometimes, when attempting to make an image out of a running EC2 instance, the ec2-bundle-vol command fails for reasons that are not clear. This can be a massive nuisance because you might have made quite a few changes to a running instance which would take significant time to recreate on a new instance in order to make an image from it.