Comment 10 for bug 1131858

Having a similar problem right now with Ubuntu 13.10 copying multiple files from mounted iso to usb stick (FAT) but got stuck at 2.6 out of 2.7 GB
Also my laptop started to lag and was almost unusable for some time during the copying but htop showed that memory usage is around 50% and CPU usage for all 8 Threads (4 Cores) never higher than 5-10% but the load average still goes up to 9.25