How do I get rid of shadow copies on SMB shares?

[Dwarf Cavendish]

For a while I have been dealing with intermittent core dumps of smbd. I sent a core to one of the developers and he pointed out that vfs_shadow_copy was enabled on my share. So I disabled it. Or so I thought.

I got core dumps again and I now checked in the GUI whether shadow copies were enabled. It turns out that the were, so I disabled them in the GUI. Upon closer inspection I also saw this:

Code:

vfs objects = zfs_space zfsacl streams_xattr shadow_copy

Now I don't know how this stuff ended up here (presumably it was put here by an older FreeNAS version?), but I'm not certain what of this to remove to get rid of the shadow copies. Just the shadow_copy bit or all of it? And most of all: what is the difference with the shadow copies checkbox in the GUI?