EDS has completed a “root cause analysis” of the fault which interrupted banks’ overnight settlement processing earlier this month.
“The problem was caused by an incident which occurred inside the data management centre during some electrical maintenance work,” says an EDS statement. “It was not related to the UPS [uninterruptible power supply] environment.
“The incident created a significant short circuit within the centre,” says EDS. “This created a power 'spike' affecting power supply in the site. The power spike also activated the alarm system resulting in an evacuation of the site by all personnel.”
As soon as staff could re-enter the site all power was immediately restored - 40 minutes after the accident, and the equipment was then brough back up in an orderly way. It took until 7.30am the next day to complete all transactions.
Since the spike triggered a circuit-breaker on the side of the UPS away from the equipment, the system could not switch automatically to backup power.
“As I understand it, that’s the way things are supposed to happen,” says spokeswoman Helen Morgan-Banda. So it is likely no equipment or procedures will be altered, since it was such a rare event.
EDS is looking into the possibility of compensation from other parties involved in the maintenance.