How to add efi partition on system disk to vxvm?

[noldi]

Hello,

my system disk on an Integrity system with
11i v2 ud2 with VxVM as root volume manager
is partitioned like this:

# cat parfile
4
EFI 500MB
HPUX 32000MB
HPUX 100%
HPSP 400MB

I have the system disk on part. 2, now I'd
like to add part. 3 to VxVM as well, un-
fortunately, I cannot seem to add that device
to VxVM:

# vxdisksetup -if c2t1d0s3
vxdisksetup: Sliced name not allowed for non-root disk.

# vxdisk -f init c2t1d0s3
vxvm:vxdisk: ERROR: Device c2t1d0s3: define failed:
Duplicate device

Although I can see /dev/[r]dsk/c2t1d0s3 with
ioscan and even pvcreate on above device
works (just to test wether that device is
accessible).

How can I get this device unter VxVM control?

Thank's & best regards,

Arnold