Attempting to add a gatekeeper device to a dynamic disk group can cause problems with subsequent operations on that disk group until the storage agent is restarted

If your storage array has a gatekeeper device (disk), do not add this disk to a dynamic disk group. The operation to include this disk in a dynamic disk group fails, and subsequent operations on the disk group, such as snapshot operations, fail until the storage agent is restarted. (864031)

Workaround: Remove any gatekeeper devices from the dynamic disk group and restart the Veritas Storage Agent (vxvm service).