To create a CDS disk by using the vxdiskadm command
Run the vxdiskadm command, and select the "Add or initialize one or more disks" item from the main menu. You are prompted to specify the format.
Warning: On CDS disks, the CDS information occupies the first sector of that disk, and there is no fdisk partition information. Attempting to create an fdisk partition (for example, by using the fdisk or format commands) erases the CDS information, and can cause data corruption..