As some of you might have noticed some of the services have been offline for about three hours. This was due to emergency maintenance work at the datacenter where work has been done to power system thus it was required to put affected servers off. However, once the power was back on, one of our servers did not come back online. Reason? Very simple. Our BIOS battery went flat causing the system to stop during post on silly "no keyboard" error and wrong date :(
After very refreshing 70km trip to the datacenter in the middle of the night, server got battery replacement and nicely came back online. TIP:
Keeping an eye on your BIOS battery can be life saving.