Use the async API call 'update_vm' to create a HD. This will encourage a worker and we can increase the time-out for ZFS at high load. Patch V1 -> V2 [storage] Rebased 32c0a1d59bfea6a21212cb5386a9d06e27089f10 -> bce13b7f505ea63bc92a12d3beabe0ebb9a802fe make timout depending on whether it is in a worker or not