Your plan seems fine but you can also try full power cycle of the MSA by plan a downtime for this activity.
If still issue persists then you can try with single controller by keeping other controller in shutdown state and check if everything working fine or not.
Yes firmware too much old so any unpredictable or odd behavior is expected.
Is this MSA not in HPE support? You can try upgrading latest firmware.
UPGRADE NOTE:
If upgrading from an older version of firmware it may require a multiple step process to get to TS252.
If below TS230 then upgrade to TS230P008 first, then TS240P004, and then TS250P003 before upgrading to TS252P005. If the firmware is between the mentioned versions, it is recommended to follow through the steps as well.
Hope this helps!
Regards
Subhajit
I am an HPE employee
If you feel this was helpful please click the KUDOS! thumb below!
***********************************************************************************
