Thanks! I checked using lsof/fuser but there were no users. I restarted the server and it appears to be working now. Maybe the files got locked for some strange reason and a reboot cleared it. I'll reply again after it finished or if it stalls again. It stalled again after moving a few files. In fact, if I restart btsync, it will move a few files then stall with the "has diskio job" log line. [20150624 14:26:48.708] FC: load torrent request, will try to load torrent for file "/var/git/valefor/ballad/prj/Layout.git/objects/2a/dea5e568d85c8a8ad9da6b82c6b77b81011f1c" [20150624 14:26:48.708] JOURNAL: skipping load torrent for file "/var/git/valefor/ballad/prj/Layout.git/objects/2a/dea5e568d85c8a8ad9da6b82c6b77b81011f1c" - has diskio job When it stalls, it stalls all files. Even if I create new files on the server, they won't show up on the client, even as a BTS file. More info: Ubuntu 14.04.2 LTS (64-bit) Filesystem EXT4 on Amazon EBS (magnetic) lsof/fuser report no use of the files.