Hello,  Joerg is correct,  Vmware requires an Enterprise or Enterprise+ license to enable the feature.  Joerg has mentioned in the past he's seen it work on other licenses, but I can't get them to properly function.  Especially after rebooting the ESXi node.   It will show as being enabled, but the behavior underneath is basically the same as FIXED pathing.   So the alternative is to use VMware Round Robin and change the IO per path from 1000 to 3.   Run this command at the ESXi shell.  Then reboot the nodes.  esxcli storage nmp satp rule add -s "VMW_SATP_EQL" -M "100E-00" -P "VMW_PSP_RR" -O "iops=3"  Additionally, here's a link that covers other best practices for ESXi with EQL storage.  en.community.dell.com/.../20434601.aspx  Regards, 
Hi Group, If a customer has vSphere 5.x standard, i.e. not enterprise or enterprise plus. Can the customer install the EQL MEM module without breaking any licensing rule from VMware?
MEM installation and VMware licensing