Does anyone have an idea what this could be?
normal filesystem "corruption" after hard crash: unflushed, but allocated, blocks are zeroed out by journal replay or fsck. so related to you switching off the box, but no hint whatsoever to the cause of the hang.
Good analysis. And right, there is no indication about the origin of the hang. This is not nice, yes, but it could remain unanswered unless more specifics are known.
Lars Ellenberg
Thanks, Roman. -- - - | Roman Drahtmüller <draht@suse.de> // Nail here | SUSE Linux AG - Security Phone: // for a new | Nürnberg, Germany +49-911-740530 // monitor! --> [x] | - -