Gathering Good Troubleshooting Information when reporting an issue with Greyhole, or asking for help regarding Greyhole. You should provide the following (execute the given commands as root).

Copy the contents of your landing zone somewhere else (preferably a non-greyhole share, so you can sort it out from the comfort and convenience of your normal workstation). In the example below, I just borrow the AFP share I have locally mounted for Apple timemachine backups, but this can be any folder. Don't copy the /drives subfolder, as that's actually the physical drives attached to the system.

Now, stop the greyhole service again. Do this from the Amahi Console->Settings->Servers->Greyhole. Disable the watchdog and press the big red 'stop' button.