Add new multipath device on line
 

Hi

First of all sorry for the stupid question...

I need to add new multipath disk on line to my server (REHL 5.7 x64) without lose I/O

I have already done some step but i am on death point because i dont't find answers on network.

My step:
1- Created lun on SAN storage and map ip to server
2- Rescan device on server
# cd /sys/class/scsi_host/host1
# echo - - - > scan
# cd /sys/class/scsi_host/host2
# echo - - - > scan
3- I find new device on /sys/block and check that they are the new device correctly
# ls /sys/block/sdn/device/
and chech that scsi_device:*:*:*:*is the right lun number
4- Get the right wwid of new device for all disk
# scsi_id -g -s /block/sdn
5- Put wwid on blacklist_exceptions on /etc/multipath.conf
6- Create friendly name on /var/lib/multipath/bindings

If i run
# mulitpath -ll
i don't get new device

I done all correctly?
How i can proced to put online new device without rebooting server and/or lose I/O?

Thank for all

Does your multipath service is running , if no then start it

/etc/init.d/multipathd start

Thanks

Solved by my self

I done all right

The only steps missing was

# mutlipath -v2

and device bring up

Thanks to all