changing a core power supply , first thought YES i need downtime ! and how long it will take to reboot …
intrest part is no need for downtime , if Cisco power set to HA . then ….
just swap one by one with no effect hopefully …( remove old one put new one and power it up , give few min to verify , then same to the other power supply )
First time to know that, and to try it live !
add to that this even works fine for downgrading power supply .. tested