I am trying something with Powerpath and Device Mapper and What would be the best way to blacklist the EMC symmetrix from Device Mapper? I just want the Device mapper to ignore all the EMC disks. What would be the best way to acheive this? Also i want to whitelist all HP XP devices so i will powermt unmanage the HP xp and need them whitlisted in Device Mapper. Environment Rhel5.8. I know there are issues with Native multipathing co-existing with Powerpath, but please share your experiences.
G Simon