Re: Moving VM attached to multiple datastores

Am I missing something here?

Yes, you're missing the "advanced" option in Storage vMotion that will allow you move each .vmdk to an different datastore... to do this, just follow the Storage vMotion screens and Select Datastore, click on Advanced and for the virtual machine configuration file and each virtual hard disk, select the datastore that you want.

Take a look at documentation: http://pubs.vmware.com/vsphere-51/index.jsp#com.vmware.vsphere.vcenterhost.doc/GUID-A15EE2F6-AAF5-40DC-98B7-0DF72E166888.html

Store virtual machine configuration files and disks in separate locations.

a Click Advanced. b For the virtual machine configuration file and for each virtual disk, select Browse, and select a datastore or Storage DRS cluster. c (Optional) If you selected a Storage DRS cluster and do not want to use Storage DRS with this virtual machine, select Disable Storage DRS for this virtual machine and select a datastore within the Storage DRS cluster. d Click Next.