It appears the ETS server is dying. One drive is dead, and another is flaky and if it goes we are down.
I need to ask, does ETS have a complete and robust backup strategy? Hard drives are cheap. The data they contain (the accumulated knowledge from this website over the years) is worth much much more.
If comprehensive backups are not currently the routine for ETS, I suggest implementing that as the absolute first priority. It tops buying new hardware or moving to other hosting solutions. Especially if "one drive is dead, the other is flakey".