You can reinitialize a disk that has previously been initialized for use by VxVM by putting it under VxVM control as you would a new disk.
See "Adding a disk to VxVM" on page 96.
If the disk you want to add has been used before, but not with a volume manager, you can encapsulate the disk to preserve its information. If the disk you want to add has previously been under LVM control, you can preserve the data it contains on a VxVM disk by the process of conversion.
See "Migrating from Sistina LVM to Veritas Volume Manager" on page 525.