By request – How to add a new LUN to RHEL using PowerPath without a reboot.
November 6th, 2008 by Daniel Raymer
Quite simple actually…
First, you need to get the HBA’s to issue a LIP and then a re-scan
- echo 1 > /sys/class/fc_host/<host #>/issue_lip
- echo "- – -" > /sys/class/scsi_host/<host #>/scan
Do this for every host path.
Now you just need to tell PowerPath to go do its normal discovery
- powermt config
If you do a display, you should see the new LUN.
- powermt display dev=all
That’s all there is to it…. go forth and fdisk!