So, yes, this is the VIO server, not where the business applications run, so that is good to know. Can I presume that there are a pair of VIO servers in play here so that the disk for the guests can have two paths to each disk, or at least each guest would have two allocations of disk that it can mirror?
Can you tell us more about this server configuration? I'm a little concerned that you might have an exposure to hardware failure.
To clean up the removed disk, see if this helps -
IBM Resolving "missing" or "removed" disks in AIX LVM - United States It took a long time for me to load the page.
Also, have a read of this for some good background on VIO servers -
The VIO cheat sheet
I hope that these help.
I would, however, worry that you might be trying to grow the wrong filesystem What makes you think that the VIO server needs to have
/usr increased? Surely this is more likely for the guest that you have your business application running in. Is there something filling
/usr and if so, which one? (VIOS or the business application LPAR) If it's the business application guest, then leave
/usr for the VIO server alone. It's not really yours.
Kind regards,
Robin