The XtremIO upgrade went well last week, All AIX servers involved stayed up.  Successful NDU! The fix is below. Customer Upgrade Preparation Guide - XtremIO  EMC added the below line. * Is using AIX, please review KB491002 prior to NDU. KB491002 Referenced the IBM fix. * Apply the IBM Authorized Program Analysis Report (APAR) mentioned in IBM IV84862 - Improve Handling of Aborted Commands on the host side. Note the fix has been rolled into a service pack.  My AIX systems that made it through the Successful NDU were running the below AIX OS level. # oslevel -s 7100-04-03-1642
I am asking because I want to know if anyone else has experienced disruptive upgrades specifically from 4.0.15-20  to 4.0.15-24? I am trying to figure out if I should be asking the community before proceeding with upgrades.   I have a support case open and I am sure DELL/EMC will have answers soon on what cause the issue, but I would like to avoid issues when it comes to affecting production. 
Any issues with XtremIO upgrades from 4.0.15-20 to 4.0.15-24?