I just inherited a client that uses a Netapp FAS960 fibre attached to an AIX 
TSM server for the DB/LOG and stgpool space. Using the
"sanlun show lun" command I see that there are 4 paths listed to each LUN going 
over FCS2 and FCS23. I also appears that the
multi-pathing software was not installed. Looking at the hdisk's assigned to my 
VG (lsvg -p) shows that the hdisks defined to the
VG's are evenly split across the FCS2/3 adapters. When I run nmon I only see 
traffic going down FCS3 and the activity I see on the
hdisks are not the ones that are defined to the VG.

Unfortunately Netapp doesn't allow you very much access to their support site 
unless you are a customer and the doc's I've been able
to read aren't very helpful. I'm just curious if the NetappLUN drive is somehow 
redirecting the I/O down a "primary" path. I read in
the SANPath gude that each path is either primary or seconday.

I'm trying to find out if the multipathing software was licensed and just not 
installed, but what I'm seeing is very confusing.

Anyone out there with some experience with Netapp's and AIX care to share some 
insight??

Bill Boyer
"Growing old is mandatory, growing up is optional" - ??