When you (try to) delete a snapshot from a virtual machine in VMWare ESX 3.5, the following error may occur:
“Remove Snapshot: Operation Timed Out.”
This error typically occurs after 15 minutes, and only when your “delta”-file is large. I.e. when you’re making many changes on the server, or when you’re running on the snapshot for some weeks.
However, VMWare is still committing the snapshot in the background. Therefor, just wait and check again after an hour. Take a coffee and a muffin, and much chance that the snapshot is deleted from the Snapshot Manager window :)
Committing all changes to the main VMDK file can take up to 1 or 2 hours or so.