topic Re: Problem with SAn configuration in MSA Storage

Problem with SAn configuration

GÃ©rald robine — Wed, 10 May 2006 08:49:48 GMT

Hello,

We have encountered a problem in our computer room (power cut) and the Controller of our bay SAN switch to the left controler instead of the right.

How could i switch the right San controler by default. I remember we can do that with secure path but can not remember how to ?

We have a MSA 1000 with 2 controler.

If you need more details let me know.

Thanks.
Gerald.

Re: Problem with SAn configuration

BR908501 — Fri, 12 May 2006 04:20:08 GMT

Gerald,

You can set a path as the preferred path using the command
spmgr prefer path_instance
When the system reboots this preferred path will be used.

Re: Problem with SAn configuration

BR908501 — Fri, 12 May 2006 04:28:43 GMT

If you want the secure path to always use the prefered controller if its is availiable then you can use the set command to enable auto-restore
# spmgr set -a on WWWN

Re: Problem with SAn configuration

GÃ©rald robine — Fri, 12 May 2006 10:23:28 GMT

Thanks for your answer, i call hP and with Secure Path Manager 4.0 we can do it by selecting "move to other controller" and the disks switch to the other controller.

Regards

Re: Problem with SAn configuration

In the documentation for SecurPatch Manager

spmgr select -c

this command moves a LUN unit to the other controlleur.
The documentation says also that the web based Secure Path Manager "select -c is referred to as "move to other controller"

What i wondering is that if i need to do that for each grap of disks or if i change it for one it does for all the disks.

I call hp they tell me all the disks will change controller but i have some doubt.

Thanks for your help.

Re: Problem with SAn configuration

BR908501 — Fri, 12 May 2006 10:36:46 GMT

If you use the spmgr select command it will switch the controller and all disks will use the new one. but this can happen again next time when there a smilar power problem. If you set a prefered path and set autorecover, the controller will automatically failback after it is recovered.