DPACK Basics: How DPACK identifies a LUN
DPACK will identify physical disks or LUNS that are either directly attached or SAN attached.
DPACK does not support and will not detect NAS storage*. NFS mounts and CIFS file shares will not be detected by DPACK.
While DPACK will identify and monitor SAN disks mounted by supported operating systems, DPACK cannot directly connect to storage array appliances.
In the case of multi-pathed SAN LUNs, DPACK will report the LUN as a single entity, and report the aggregate IO across all paths.
In the case of VMware when DPACK is connected directly to a vCenter server, DPACK will not identify mounted CIFS or NFS shares on the guest VMs, nor will it identify iSCSI SAN LUNs mounted directly by the guest VMs using software initiators. DPACK will identify pass through disks such as RDMs and raw LUNS connected to the ESX servers.
This is also true with Hyper-V virtual machines. DPACK will not identify iSCSI LUNs that are mounted directly by the virtual machines using a software initiator.
* DPACK will detect NAS mounted VMware Datastores if the ESX server and vCenter server are running version 4.1 or greater.