I'm working on retiring a failing NetApp cluster. It offers iCSCI, NFS, and CIFS volumes to the network. For CIFS, we're fairly under control there. It's a limited set of shares, and there's recent "last modified" filestamps in only a couple of locations.
However, how can I be sure that nothing else is using the storage - alternatively, how can I find what else is attached to it?
For iSCSI, the only initiators are our ESX farm, which no longer has any client disks on this device - there were some datastores and RDMs that have been migrated or turned off. But that does leave the possibility of something still using NFS from within a client.