Cannot mount zfs filesystem

[abertolli]

I am not sure why, but I don't seem to be able to mount a newly created zfs filesystem. Everything else seems to be working with zfs and zpool commands. I receive no errors, but neither mount nor df reports the filesystem, and it appears to be missing.

[behlendorf]

Mounting the filesystem requires the ZPL (ZFS Posix Layer), there is currently an initial implementation of this layer but there is still quite a bit of work to be done. Until this work is done you won't be able to mount the filesystem.

http://zfsonlinux.org/example-zpl.html

You might find the following related thread on the zfs-devel list interesting:
http://groups.google.com/a/zfsonlinux.org/group/zfs-devel/topics

[abertolli]

Does this mean that ZFS is not usuable at this time (via this module)? Or do I need to do something else like legacy mount?

[behlendorf]

Yes and no. It means you can't use it to create a filesystem data set at this time, you can however create zvol virtual block devices. Hopefully over the coming months we'll get the posix layer in place since this is of course what everyone wants.