Hello. There is only one possibility to change sector size of physical disk (gnop -S 4096 ...). May be it is possible to add such possibility to gpart? e.g. gpart create -S 4096 -t gpt ad0? It will help all unlucky WD Advanced Format disks users. :-D -- Alexey Tarasov (\__/) (='.'=) E[: | | | | :]З (")_(")