@gwoodson
There are many benefits to be gained from shared infrastructures.
Sure, they have to be designed, implemented, managed, and tested regularly to maintain availability.
The VITA situation is hard to fully assess without being there and analyzing their configuration. If two boards in two different, redundant arrays went out at the same time, that's a pretty bizarre situation; and in that case wouldn't be a single point of failure.
I've worked on SANs for 10 years and they can be extremely highly available, with data replication across large geographies where necessary. Proper planning, design, and execution is important to be sure.
And if this is truly *one* of those incredibly odd, multiple outage situations, well you can hardly make a serious argument that tens of thousands of successful implementations are mistakes.
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