On Saturday 12 November 2005 15:47, William Boyer wrote: > 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?? No, but it it possible that you have multipath software and that's working. Sometimes there is a primary and a backup path. So when the primary goes down, the backup path takes over. You only see I/O on 1 path. Sometimes there is a load balancing between all available paths. So you see I/O accross all available paths.
Can you post the output of lsdev -Cc disk ? Stef
