Recently I was involved with migrating SAN, Our Storage folks are replacing there old SAN switches with NEW switches. New cables were layed out from the NEW switch and all I had to do is to remove fcs0 old connection and replace it with new connection from the new switch and vice versa on fcs1. So this is what happens
1. Physically disconnect OLD fibre from fcs0 and reconnect it with the new fibre
2. Fix the dead paths
3. Physically disconnect OLD fibre from fcs1 and reconnect it with the new fibre
4. Fix the dead paths.
Since powerpath was installed on these servers, I should be able to run the below commands to fix the dead paths in 2 & 4
# powermt check
# powermt config
Now the question is, I am able to run these commands and fix dead paths on AIX 5.2 but on AIX 5.3 my “powermt check” hangs, this is not a particular case, This is will all the servers I am working on and the only resolution is to reboot the servers for the paths to come alive.
Why is this happening on AIX 5.3, Is there any other way to fix the dead paths other than rebooting