If you commonly have the same volume name on different SVMs (for instance a "vol1" on SVM01 and SVM02). The number differentiates at the node level between two different volumes of the same name because at some point both volumes could "live" on the same node and be accessible via the "/vol/..." path. At the Cluster level, cDot translates appropriately based on the SVM the volume is in.
Hope this helps you.
Bob Greenwald
Lead Storage Engineer | Consilio, LLC
NCIE SAN Clustered, Data Protection
Kudos and accepted solutions are always appreciated.