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On October 1, the Tokyo Stock Exchange (TSE) was halted for a complete day due to an issue IT professionals tend to overlook, a piece of hardware.
A crucial data storage and distribution device dubbed “Arrowhead” had malfunctioned, and the automatic backup failed to initiate. Arrowhead is the heartbeat of the TSE, giving and taking commands, routing data and, most importantly, monitoring trades. Without it, the exchange was forced to shut down for a full day, its longest sustained outage since 1999.
What happened?
The Arrowhead system is a hardware and software suite developed by Fujitsu that consists of two shared disk devices. On the day in question, the primary disk “Number 1 shared disk” encountered a memory error. When this occurred, the secondary device “Number 2 shared disk” should have automatically taken over in a failover procedure – essentially a handshake – to seamlessly keep processes functioning as normal. But this was not the case, since a forced manual failover needed to occur and that would have required a restart of the entire system, which was out of the question since orders, trades and data were already beginning to backlog. TSE officials made the decision to halt trading and resume operations the next day.
What could have prevented this?
Additional Backup and Recovery Considerations
If you have questions about your backup and recovery strategies or your disaster recovery plan, please connect with us. We would welcome a discussion.
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