Before you use a disk, you need to know if it has been initialized and placed under VxVM control. You also need to know if the disk is part of a disk group, because you cannot create volumes on a disk that is not part of a disk group. The vxdisk list command displays device names for all recognized disks, the disk names, the disk group names associated with each disk, and the status of each disk.
To display information on all disks that are known to VxVM
# vxdisk list
DEVICE TYPE DISK GROUP STATUS c0t0d0s2 auto:sliced mydg04 mydg online c1t0d0s2 auto:sliced mydg03 mydg online c1t1d0s2 auto:sliced - - online invalid enc0_2 auto:sliced mydg02 mydg online enc0_3 auto:sliced mydg05 mydg online sena0_0 auto:sliced - - online sena0_1 auto:sliced - - online
The phrase online invalid in the STATUS line indicates that a disk has not yet been added to VxVM control. These disks may or may not have been initialized by VxVM previously. Disks that are listed as online are already under VxVM control.