...The video surveillance system is now attached to six physical servers running VMware Inc.'s vSphere 4 server virtualization software. The virtual machines' master files are stored on SAS capacity in the DataDirect Networks array, and La Vertu said he fronted the array with two servers running DataCore Software Inc. to make redundant DDNS2A9900's look like one virtualized pool.
This was done on a recommendation by DataDirect Networks, La Vertu said, because DDN does not support native array-based volume replication. "DataCore does virtualization across multiple arrays," he said. "DDN can't do that without a third party."