Transmission says permission denied on download

[Grimm Spector]

So I have some storage attached to Transmissions jail, and I've set the three location options in the plugins extra configuration area in FreeNAS to the storage I gave to it. But when I launch it's web interface it tries to use a mount point that is inside FreeNAS disk system, i.e. /mnt/ZVOL/Dataset, as opposed to it's own local path /mnt/storage. This is pretty strange, but whether I correct that to one of it's local paths, or I leave it to some theoretically valid FreeNAS path that it should not be able to see, it will not download anything. It gets a few megabytes of data and then fails and stops saying:
Error: permission denied (pathname)

Where pathname is actually the path that I set in the webuis options menu. It seems to not care what paths i set for it in the FreeNAS config menu under plugins in the navtree.

I've tried many different paths, and I do not know why it's giving me this error, unless it needs some special unique permissions setup, which would be problematic given I have other things operating off the datasets I'd prefer it use. I thought that the plugin storage mounting system go around those sorts of problems.

I'd love to know how to fix this so I can actually use this plugin...thanks!

 

[Basil Hendroff]

Transmission (UID 921) needs to be the owner of the directories both inside and outside the jail. More info here.

 

[marcevan]

Tried all that. Transmission is owner of downloads directory within it's jail and outside it's jail. Transmission_user was set to transmission. Transmission user was added to nobody group just as a precaution since Downloads dataset must have a group owner even if unchecking to assign to a group.