Ok,
My server has 2 vg : vg00 and vg02.

I think I have to strike:
# for create dir:
mkdir /dev/vgdata

# I found this command but I don't know what that mean and #what it is use for:
mknod /dev/vgdata/group c 64 Ox02000

# the import command:
vgimport -v /dev/vgdata /dev/dsk/c0t10d0

# activate the volume group
vgchange -a y /dev/vgdata

Can you tell me if there is a mistake?