Why Does My SAN Keep Failing Microsoft Exchange 2010 Jetstress?

Written by Benny Lakunishok, Senior Microsoft Premier Field Engineer. As many know by now, in Exchange 2010, Microsoft managed to get disk I/O numbers so low that it’s able to run perfectly well on DAS (direct-attached storage) and even JBODs (i.e. DAS with no RAID configured).  So how come we should still run Jetstress, the…