VMware KB: ESXi/ESX hosts with visibility to RDM LUNs being used by MSCS nodes with RDMs may take a long time to boot or during LUN rescan 29 July, 2013 by Phil Morris This was a great find – fixed the 45 minute boot time due to the large number of RDMs in use: VMware KB: ESXi/ESX hosts with visibility to RDM LUNs being used by MSCS nodes with RDMs may take a long time to boot or during LUN rescan. Share this: Share on X (Opens in new window) X Email a link to a friend (Opens in new window) Email Share on Facebook (Opens in new window) Facebook Share on LinkedIn (Opens in new window) LinkedIn