2012-05-06 03:09 PM
I help cumsomer to create the sam enviroment,
it's have full path,
two fas2040 controllers,two san switchs,to HBAs,
my operation system is windows server 2008 R2,
I install the Multi-Path I/O item in "function",
and I have to try to reboot,
but I always see four path,
andbody can help me to resolve?
please and thanks very much~
2012-06-06 12:07 AM
If you want to get single path then,it can be done either by disabling the HBA(through device manager),disabling the Switch ports or by disabling the Controller ports etc.But I think your question is that after installing the Multipath and rebooting you are still seeing the 4 paths.That should be fine to have since Multipath driver
would have created a Virtual LUN for the 4 physical disk objects that are seen from the 4 paths for the same LUN and it hides these 4 disk objects from the disk subsystem/file manager.
2012-06-06 03:07 AM
This is fine, as two paths should be seen as 'optimized' - going through the NetApp controller owning the LUN, and two additional as 'unoptimized' - going through the other controller & cluster interconnect to the same LUN.
Your multipathing should be configured to use ALUA (Asymmetric Logical Unit Access): http://www.yellow-bricks.com/2009/09/29/whats-that-alua-exactly/