We also have the same HP array's and also have to reboot host to bring in storage which is annoying.
To avoid a reboot I sometimes unload the HBA driver after I put a host into maintenance mode. We use Qlogic cards
vmkload_mod -u qla2300_707
If you have HP Insight Agents installed you need to stop the agents in order to unload the HBA driver.
Not to hijack the thread but when storage is presented to a host shouldnt the host see an RSCN prior to a rescan ? in vmkernel
I remembered working with EMC Arrays and not having to reboot the host everytime I wanted to bring in storage. But then again I didnt have to bring in storage from different array's. I would present storage and rescan and I would see what I presented right away.
