Share your knowledge at the LQ Wiki.
Go Back > Forums > Linux Forums > Linux - Newbie
User Name
Linux - Newbie This Linux forum is for members that are new to Linux.
Just starting out and have a question? If it is not in the man pages or the how-to's this is the place!


  Search this Thread
Old 07-31-2013, 03:49 AM   #1
LQ Newbie
Registered: Jul 2013
Posts: 4

Rep: Reputation: Disabled
Add new multipath device on line


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
Old 08-01-2013, 07:40 AM   #2
Registered: Feb 2008
Distribution: Fedora,RHEL,Ubuntu
Posts: 661

Rep: Reputation: 66
Does your multipath service is running , if no then start it

/etc/init.d/multipathd start

Old 08-02-2013, 04:20 PM   #3
LQ Newbie
Registered: Jul 2013
Posts: 4

Original Poster
Rep: Reputation: Disabled
Solved by my self

I done all right

The only steps missing was

# mutlipath -v2

and device bring up

Thanks to all


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Boot from multipath device on Redhat 5.4 (kernel Zen1988 Linux - Server 0 07-08-2012 10:52 PM
device-mapper-multipath, slow failover period. Gangrif Linux - Software 2 02-07-2011 11:22 AM
Problem: Delay construction of multipath device (/ dev/dm-3) chilon Linux - Server 0 01-07-2010 12:00 PM
device mapper / multipath creating extra device, won't let me talk to the one i want chakkerz Linux - Server 1 03-16-2008 06:52 PM
partition a mappered device using multipath smile2 Linux - Hardware 1 05-04-2007 11:24 AM > Forums > Linux Forums > Linux - Newbie

All times are GMT -5. The time now is 09:58 PM.

Main Menu
Write for LQ is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration