vxvm cannot see the disk.
c4t0d0
/pci@8,600000/SUNW,qlc@1/fp@0,0/ssd
Format returns the above. Isn't this a label? It looks amost identical to the disks that vxvm can see. Here's an example of a disk vxvm can see. The only difference is the controller.
c3t26d0
/pci@8,700000/SUNW,qlc@1/fp@0,0/ssd
Note the disks are on different controllers.