If you have a Brocade SAN with 8Gb connections make sure the ports on the SAN switch have the portcfgfillword mode set to 3.  I experienced a lot of hot login issues witht he default setting of 0 and when I switched all the ports to 3 they pretty much went away; I had particular issues with AIX.  EMC is now recommending you set Brocade 8Gb switches to mode 3 as the default.  Setting this mode on a port does a quick reset on that port.  Best practice guideline for 8G FC platforms. For Brocade 8G platforms running FOS v6.3.1 or higher, configuring the fill word to mode 3 typically enables the port to use the right combination of Fibre Channel primitives to fully interoperate with the attached end the link between the Brocade 8G switch port and the end device. If a device is known to require mode 2 (IDLE/ARB) then configuring mode 2 on the 8G switch port will activate the link sooner. If mode 3 is used in this environment, then the port will first attempt mode 1 then eventually settle to mode 2 which will cause a delay in initializing the port. If a device requires IDLE/IDLE combination for link initialization then one needs to set the needed port to mode 0 using portcfgfillword CLI.
IBM VIO servers using NPIV  Zone completed with 8 wwps(virtual wwns) but  wwns are not showing up in VMAX. All wwns are logged in to Fabric but not into VMAX. So the luns are not visibile to the host. What could be the problem ? Any idea ?
IBM VIO server wont login to VMAX