Since W20008 we see isues where MPIO grabs lun ownership before Powerpath adn thus PP cannot see luns. The only work around we have found is..

1. Uninstall MPIO
2. Uninstall PP à reboot
3. Finish MPIO uninstall through config mgr à reboot
4. Install PP à reboot
5. Install PP patch 1 à reboot

This seems to fix it but requires manay reboots and w2k2008 reinstalls MPIO on it's own again after this. Is there any way to eliminate MPIO or does PP require parts of it to function or possibly a setting in MPIO to stop it from grabbing drive ownership?

Scott