I recently had to resolve an issue where a storage vMotion failed half way through the move process.
When I looked at the VM’s .vmx file, I should see all of the disks where pointing to the snapshots, and there where the DMotion files (used as part of the Storage Vmotion)
-rw——- 1 root root 623831040 Jun 18 08:13 DMotion-scsi0:01_SERVER-000001-delta.vmdk
-rw——- 1 root root 327 Jun 16 22:07 DMotion-scsi0:01_SERVER-000001.vmdk
The way to resolve this is to create a new snapshot, and then use the option to delete all snapshots. This can be done using Virtual Centre or the vmware-cmd command line tool.
Once the removal process completes, all of the snaphot files, including the DMotion files are played back into the orginal vmdk files.