We have a SBS 2003 server that appears to be struggling to copy files. It runs quite quickly but then appears to pause.
The estimated time remaining for the procedure will increase steadily and then it removes the estimated remaining time. After a couple of minutes, the time reduces again as presumably the copy starts working. This cycle repeats until the copy is finished.
I've disabled the antivirus for that location and this had no effect.
I also wondered if it could be a disk or RAID fault but there's nothing apparent in the event log.