Hi Stan,    re: MEM.  No MEM is not required and depending on what version of vSphere you have there's a minimum licensing requirement from VMware to use it.   5.x it's Enterprise or Enterprise+ and 6.x is Standard and above.  MEM is most beneficial when you have more that one member in a pool.    Re: Config.  Good.  Just wanted to make sure that you have two VMK ports with only one physical NIC attached to it and bound to iSCSI adapter.  On the volume connection tab in the EQL GUI you should see two active iSCSI sessions from each ESXi server.    Don  
I created an 800 GB Volume and have it connected to one of 3 ESXi Host.  I did not create it as thin provisioned.  Also, Not using snapshots (i set this to 0) at this time. If I wanted to go back and set the vol to thin, is there a recommended setting for the slider bars below the thin provision option?    thanks
EquaLogic Volume Provisioning