Time Machine fails to backup citing full disk

[BitSprocket]

Running
FreeNAS-9.3-STABLE-201602031011

I've created a time machine share using the tutorials and it worked once but now it fails stating the disk is full. I've gone to the share and cleaned up a lot of junk and now there is 129Gb available and I'm only backing up 40G from my Mac.

Here's a snap of my storage:

As you can see, according to FreeNAS there's plenty of room left.

Thoughts?

 

[BitSprocket]

Here's the error I get:

 

[BitSprocket]

Did the Time Machine get constrained to a certain size when I created it because there wasn't much room on the volume? Should I destroy the share and recreate it?

 

[Robert Trevellyan]

I think you're on the right track. Try mounting the disk image in Finder and see what size it reports.