An internal check performed for the disk group name fails.
This issue has been resolved by modifying the way a missing disk can be removed from a disk group. With this hotfix, while using the vxdg rmdisk command, it is now possible to remove a missing disk from a disk group either by specifying only its display name (for example, "Missing Disk (disk#)") or by specifying both its internal name and name of the disk group to which it belongs.
To obtain the hotfix, please contact Veritas Enterprise Technical Support and reference this article during the call.
Note: This fix specifically addresses the problem identified above. It is highly recommended to work with Technical Support before modifying disk groups with incomplete configuration as in the case of having missing disks.