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Powerpath and MPIO on W2008
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..
- Uninstall MPIO
- Uninstall PP à reboot
- Finish MPIO uninstall through config mgr à reboot
- Install PP à reboot
- 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
Mich
86 Posts
0
December 22nd, 2011 13:00
We have seen this issue in support quite a few times, but have been unable to reproduce it in the lab.
PowerPath packages Microsoft MPIO for W2K3 installations and installs or upgrades if needed. On Windows 2008 it just enables the feature on the O/S. Yes PowerPath requires MPIO.
As far as I am aware we have not been able to resolve this issue without the procedure you mentioned.
With regard to your procedure....I would swap 1 & 2 around and add a reboot.
Regards, Michel.