Help! All my disks are already in rootvg!

I don't have a spare disk for altinst_rootvg to upgrade my VIOS.

The problem is well known. To perform a VIOS upgrade, you need a spare disk. If you have a mirrored rootvg, you need two disks. The solution is well-known, too. Ask your storage administrator for additional disks! He or she will be very glad to hear it. Your manager? Too! What should we do? Many administrators, myself included, unmirror rootvg to get th…