HP UX Disk Mirror

Being somewhat extremely new to Unix, I have just had a system crash

One of my Volume Groups has crashed
However, this Volume Group is actually mirrored

How do I switch to use the mirrored copy?

Any assistance greatly appreciated

Thanks

"somewhat extremely".... whoa

It should have been using both sides of the mirror all along. When a disk dies it should switch automatically to use just one side of the mirror. If that didn't happen, the disk must not have been mirrored.