> Prior to the failure, we had been seeing some anomalous behaviour from the A server in this pair. The machine had been taken offline and memory tests performe

> Prior to the failure, we had been seeing some anomalous behaviour from the A server in this pair. The machine had been taken offline and memory tests performed, but no issue was found. Presumably the anomalous behavior was disk-related and yet they only test memory. Why not check SMART status? Or if the RAID driver doesn't support SMART passthrough; move the drives to the SATA controller and boot off of a flash drive. Also, there are tools to generate lots of i/o and test for failures, i.e.: http://www.peereboom.us/iogen/ http://www.peereboom.us/iogen/