g_dev_taste: make_dev_p() failed

GOHORNS:/usr/src/sys# uname -a
FreeBSD GOHORNS.housenet.jrv 10.0-CURRENT FreeBSD 10.0-CURRENT #0
r240529: Sat Sep 15 03:10:21 CDT 2012
root_at_GOHORNS.housenet.jrv:/usr/obj/usr/src/sys/GENERIC  amd64

I am getting an error when attaching some disks from Mac OSX.  This is
an enclose of 5 SATA disks used with OSX ZFS.

Sep 19 02:56:28 GOHORNS kernel: g_dev_taste: make_dev_p() failed
(gp->name=gpt/oformat%<FF>^P<B9>,, error=17)
Sep 19 02:56:28 GOHORNS last message repeated 3 times

When I look in /dev the device entries are there.  Under FreeBSD it's
using the siis driver for these disks.

Each disk is GPT partitioned by OSX rather than whole disks ZFS.  It
looks like this in OSX    :

/dev/disk2
   #:                       TYPE NAME                    SIZE      
IDENTIFIER
   0:      GUID_partition_scheme                        *3.0 TB     disk2
   1:                        EFI                         209.7 MB   disk2s1
   2:                        ZFS                         3.0 TB     disk2s2
/dev/disk3
   #:                       TYPE NAME                    SIZE      
IDENTIFIER
   0:      GUID_partition_scheme                        *3.0 TB     disk3
   1:                        EFI                         209.7 MB   disk3s1
   2:                        ZFS                         3.0 TB     disk3s2
/dev/disk4
   #:                       TYPE NAME                    SIZE      
IDENTIFIER
   0:      GUID_partition_scheme                        *3.0 TB     disk4
   1:                        EFI                         209.7 MB   disk4s1
   2:                        ZFS                         3.0 TB     disk4s2
/dev/disk5
   #:                       TYPE NAME                    SIZE      
IDENTIFIER
   0:      GUID_partition_scheme                        *3.0 TB     disk5
   1:                        EFI                         209.7 MB   disk5s1
   2:                        ZFS                         3.0 TB     disk5s2
/dev/disk6
   #:                       TYPE NAME                    SIZE      
IDENTIFIER
   0:      GUID_partition_scheme                        *3.0 TB     disk6
   1:                        EFI                         209.7 MB   disk6s1
   2:                        ZFS                         3.0 TB     disk6s2