Trailer roofs and windows leak. The unavoidable dust settles, and pile drivers shake buildings. Douglas isolates servers in a room he can somewhat control, but that control is limited. Interrupted power, complete with surges and brownouts, is another chronic feature of building sites. Digging crews cut through poorly marked buried cables or turn off power earlier than scheduled or with no warning.
Computers lock up, and users accidentally cut off power.
If a server goes down at a critical point in a save, the file could be corrupted. Each server has an uninterruptible power supply unit. Douglas would prefer to have them on each computer, but he knows that wish is not realistic. His prescription for the power plague is a reliable backup system complete with adequate server space. When the stadium project started, Douglas was using ARCserve by Cheyenne, a division of Computer Associates.