Intro Migrating VMs to a NetApp filer is all well and good, but there’s a disk alignment issue to get past once those migrations are done, otherwise your expected performance will be seriously impacted. You should use the version of the mbralign tool included with the latest NetApp Virtual Storage Console (VSC) to check VMDK partition alignment. There is a version of mbralign for ESX hosts and one for ESXi hosts and you’re given the option to select the correct one at download.