I wouldn't skip any of the mentioned upgrades as mentioned. If it's recommended like this, there's a reason why [IMAGE]  As for time requirements I'd say you'd need about half an hour, maybe 1 hour per upgrade which includes making sure there's enough space on flash, copying the new code to flash, running the upgrade and verify everything is still working.  > Seeing that our 9222i has only one Sup module, any upgrade is going to be disruptive Nope.... most upgrades are NDUs, non disruptive upgrades [IMAGE], although in certain cases with special blades, like iscsi or SSM it can be disruptive. The release notes do mention these exceptions.
After reading the doc's, I have a question about the upgrade path and non-disruptive and disruptive.  Seeing that our 9222i has only one Sup module, any upgrade is going to be disruptive.   Not caring about the disruptive part ( in that it has to reboot the switch).  Currently the switch has ver. 3.2.3(a) running and I need to get to 5.01(a).  The doc's state I need to go to 3.3 then 4.2 then 5.01a, for non-disruptive.  Can I skip any of these version upgrades  without losing any configuration inforamtion ( zoning, aliases, etc.).  Main reason for asking is time constraints for doing the upgrades.  Thanks,  Bing 
MDS 9222i Upgrade to 5.01(a)