i believe you configured the RDM Physical mode.Which is causing error to migrate the vms to other host.
VMware does not permit vMotion or Storage vMotion migrations when a virtual machine is using SCSI bus-sharing. This includes Oracle RAC and MSCS virtual machines located on Storage DRS datastore clusters.
To work around this issue, VMware recommends migrating a virtual machine that is participating in SCSI bus-sharing by powering down the virtual machine that resulted in the error message and performing a cold migration to the new host.