This SG 310 never seems to be able to keep accurate time. I sync it with my PC every couple of weeks and the next time I check, it's way off again (by several days to a week). I just recently added an external time server, but that doesn't seem to make a difference. Any ideas what is going on?
the 310 can't remember time after a reboot and needs an external time server to keep accurate time.
this should solve the issue, although it can take some time to sync with the external server.