HP StorageWorks SAN Virtualization Services Platform administrator guide (5697-0204, January 2010)

VSM server LUN masking
To verify a proper LUN masking configuration on the VSM server, open the VSM management interface
and go to the back-end LUs. Make sure that VSM can see all the back-end LUs provisioned to the
VSM HBAs. For each back-end LU, verify that the number of paths is correct. To check the settings of
the second VSM, failover the passive VSM server, and then repeat the process.
DPM LUN masking
To verify proper LUN masking from the DPM side, extract the SaSnap package and open the pscs
file located in the \proc\kahuna\css folder. Use your preferred editor application, such as Microsoft
Notepad. Below is an example of the file content:
Index PSCObjP Initiator WWPN Target WWPN LUN Type IOCR MXSZ
===== =========== ================ ================ ===== ===== ==== ====
0 0x4829b008 50001fe100002002 50001fe15000c8a9 1 FCP SOFT --
1 0x4829b18c 50001fe100002002 50001fe15000c8a9 2 FCP SOFT --
This file shows the current accessible paths for physical disks (virtual disks) presented to the DPM from
the EVAs or MSAs. An entry is created only if the path (for example, Initiator port – Target port –
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 maintenance and troubleshooting128