At this time I have no formal training on VMware, EsxCluster or iSCSI but I work with VMware Daily. I consider VMware Cookbook a must read/must have book for any system administrator that is working with VMware. The company I work for has a 6 node ESX cluster that was put together by employees that were trained on VMware and have since left the company after the company went into salary/benefits cutback mode. This Company expects this EsxCluster to be up 24x7, since it has about 40 systems that are critical for the day to day production cycle, not a reasonable request since most of the systems techs remaining have no formal VM training. The VMware Cookbook has been a tremendous help in getting me through some difficult problems and projects