But now, on its help page, Salesforce has issued an apology for the disruption and has moved to reassure customers that if a similar event were to occur in future, the disruption would be resolved much more quickly.
The root cause of the issue was that a circuit breaker responsible for controlling power to the Washington datacenter failed on 9 May.
"The breakers are used to segment power from the data center universal power supply ring and direct the power into the different rooms.
This was only the start - in an effort to restore service to the NA14 instance as quickly as possible, the team then moved it from its primary data center Washington to its secondary data center in Chicago.
All functionality was restored to the NA14 instance, including sandbox copy and weekly export functionality, on 15 May.
From that investigation, corrective steps will be determined and implemented," said Salesforce.