Shared by a user on Facebook - Repost with permission
I used to support a customer many many years ago (won’t mention the name - relatively big company) whose system used to go down about 4pm every Saturday. It would come back up after about 5 minutes. For the longest time I couldn’t figure out why - and I used to go through all the UNIX scripts and logs to figure out what was happening. Finally I asked the adminisrator to take me through what happened at the premises every Saturday from 3:30 onwards.
Finally I figured out what was happening. They were shutting off the mains at 4, and the aux power would come online 5 minutes later! Took us almost 3 months to figure it out! :)
lycan2046
