The rootvg Event
talor 27000411MV Visits (1913)
I had an instance where an AIX LPAR had it's rootvg LUN that it was booting from made unavailable.The obvious fix was to ensure that the rootvg LUN was available again, and re-start the LPAR.
What I found interesting was that the LPAR was still responding to a ping, even with no operating system, and it was still up! Obviously I wasn't able to log in, the LPAR was pretty much dead so after re-starting it, all was ok.
I was reading about the "rootvg event" in PowerHA 7.1. There is a good post about it here: http
If you are booting from SAN disk and the SAN disk is unavailable, your AIX LPAR is going to need to be rebooted once the disk is made available again, as it's operating system is gone. This is the behavior that you would expect.
In the case of PowerHA, it's interface is still up, so will the cluster failover resource groups to another node? If you are using a PowerHA version earlier than 7.1, then maybe not.
This is why there is a ROOTVG event in PowerHA 7.1. You can see this via # smitty cm_system_events. You can turn off the feature that reboots AIX when the rootvg is "gone", however thankfully it is turned on by default, I don't see any reason why you would turn it off.