Fire alarm destroys hard drives
Not really a post-mortem. I know. But an interesting combination of unrelated things resulting in real problems.
“A loud sound emitted by a fire alarm system has destroyed the hard drives of a Swedish data center, downing Nasdaq operations across Northern Europe.”
"Because of the incident, Nasdaq Nordic could not start trading operations at 08:00, local time, when stock markets across Northern Europe were set to open. Affected markets include the ones in Sweden, Finland, Denmark, Iceland, and the three Baltic states. Norway’s Nasdaq operations were somehow not affected.
Nasdaq Nordic fixed the issue by 14:00, local times, when it brought online a backup system to facilitate stock and securities trading in the area."