[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]

Re: [linux-lvm] How to associate two paths for each EMC device?



The very basic way to identify the pair is to lvm each of the first 22 luns in a sequence and see which lun in the other 22 set is also lvm'ed.

However, there must be a more technical way to resolve this and eventually make the disk represent only once.  Any guru out there can help?

Regards,
Shan Jing

Unix Group - Americas
Deutsche Bank
2 Gatehall Drive, 3rd Floor
Parsippany, New Jersey, USA
shan jing db com
973.682.3463




                                                                                                                                       
                      Theo Van Dinter                                                                                                  
                      <felicity kluge n        To:       LVM general discussion and development <linux-lvm redhat com>                 
                      et>                      cc:                                                                                     
                      Sent by:                 Subject:  Re: [linux-lvm] How to associate two paths for each EMC device?               
                      linux-lvm-bounces                                                                                                
                      @redhat.com                                                                                                      
                                                                                                                                       
                                                                                                                                       
                      03/19/2004 12:44                                                                                                 
                      PM                                                                                                               
                      Please respond to                                                                                                
                      LVM general                                                                                                      
                      discussion and                                                                                                   
                      development                                                                                                      
                                                                                                                                       
                                                                                                                                       




On Fri, Mar 19, 2004 at 12:21:51PM -0500, Shan Jing wrote:
> I have 22  EMC symmetrix disks on two HBA links.  At this moment, there is no working copy of EMC powerpath or HP Securepath available for my kernel (2.4.21-112-itanium2-smp); therefore, I have to use the luns directly with lvm without any DMP software in the middle.
>
> Without DMP software, there are two set of 22 luns, each representing one HBA path.  See blow.

Can you set your HBA driver to do failover?   ie: something like this
in modules.conf:

options qla2300 ql2xfailover=1 ql2xmaxqdepth=64


This works well for my servers connected to a CX-series array. :)   The
driver handles failing between HBAs (active-passive), and only has the
LUN presented once to the system.

--
Randomly Generated Tagline:
"I didn't know Allman was a stand-up comedian ..."
         - Theo about laughter from sendmail tutorial

_______________________________________________
linux-lvm mailing list
linux-lvm redhat com
https://www.redhat.com/mailman/listinfo/linux-lvm
read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/

The following file(s) have been deleted by: Shan Jing on 3/19/2004 1:58:20 PM

C.DTF
attq5vht.dat





--

This e-mail may contain confidential and/or privileged information. If you are not the intended recipient (or have received this e-mail in error) please notify the sender immediately and destroy this e-mail. Any unauthorized copying, disclosure or distribution of the material in this e-mail is strictly forbidden.



[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]