You can remove a disk on which some subdisks are defined. For example, you can consolidate all the volumes onto one disk. If you use the vxdiskadm program to remove a disk, you can choose to move volumes off that disk.
Some subdisks are not movable. A subdisk may not be movable for one of the following reasons:
To remove a disk with subdisks
VxVM ERROR V-5-2-369 The following volumes currently use part of disk mydg02: home usrvol Volumes must be moved from mydg02 before it can be removed. Move volumes to other disks? [y,n,q,?] (default: n)