What is the model of SGI RAID and OS version?

I assume you are seeing that error message in the raid controller rather than on the system itself?

I would expect to see this if you had device mapper/multipath setup (i.e. using /etc/mpp.conf) as by default some raid so not handle the path checkers correctly.

Depending on the hardware/software there are a number of options to play with from changing the path checker type to disabling the auto logical drive transfer features etc.

I would assume if you only have one controller plugged into the host, you do not see these issues?

Sorry, brain is not in gear. I know who you are and the answers to some of those questions!

So the reality is that IF this raid is not under SGI support it might be a little hard to do properly as the firmware level is likely to be old and the smooth running of rdac/device mapper/mpp seems to be tied to sync'd up firmware levels.

I will send you a couple of suggestions in a seperate e-mail but I would advise against too much experimentation with it in a multi controller/path environment if it has live data on etc.

cheers

Nige