HP StorageWorks SAN Virtualization Services Platform administrator guide (5697-8056, March 2009)

LUN) is visible to the DPM (in other words, logged in and responding to I/Os). Missing entries typically
indicate that a physical disk is not properly connected (check cabling and zoning) or enabled (check
LUN masking).
The table includes at least one entry for every path (for example, I_T_L nexus) from the DPM to the
physical disk. In most cases, there may be one more entry than expected for the same LUN; if so, the
extra entry, typically the one with the higher “Index” (first column) of the two, indicates that the path
is currently in active use for I/Os.
Each entry shows the initiator WWPN on the DPM, the target WWPN of the EVA or MSA controller,
and the LUN. Make sure each odd-numbered DPM port can see all back-end LUs provisioned to this
port. Note that a back-end LU may be seen multiple times through different EVA or MSA controller
ports. Repeat the same process for all DPMs.
Basic troubleshooting94