My customer runs all their operational servers at a data center. Recently at the DC we did a server consolidation and migrated most of the non production physical servers into virtual machines. The good thing we got lot of computing power and all the add-on from virtualization.
Well Virtualization is a good topic and there are a lot to be discussed but I am going to write about what happened in the last week.
Suddenly all the Virtual Machines were not accessible and my Production Database's ASM Disk were not found. A total blackout and the reason is an outage from a storage device. The data center had a massive HP EVA (Enterprise Virtual Array) in which my customers data resides. The technical reason was both the EVA Controllers failed and unfortunately the EVA Cluster configuration did not work.