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How to verify the SAN load balancing software of the HP-UX server

Waqar Razi
Regular Advisor

How to verify the SAN load balancing software of the HP-UX server

I am a new hire and I was checking out the database server. The server details are as follows:

 

HP-UX apple B.11.31 U ia64 1704085172 unlimited-user license

 

I was checking out the server and it looks like the server has power path installed on it. I am getting an output from powermt display dev=all.

 

Can someone please give me directions on how to determine if this system is using native multipathing or power path ?

 

Regards,

 

Waqar

2 REPLIES
singh sanjeev
Trusted Contributor

Re: How to verify the SAN load balancing software of the HP-UX server

Is legacy device file is active on the system and VG were created via Legacy , then pwerpath may be doing the loadbacling , else native multipathing will be working.

#sar -L 1 5
will show you the lun path activating of disk.
Sanjeev Singh
Torsten.
Acclaimed Contributor

Re: How to verify the SAN load balancing software of the HP-UX server

Could you please tell what kind of storage device you are using?

 

You can get information by using "scsimgr".

 

Example:

 

# scsimgr get_info -D /dev/rdisk/disk54

...

LUN path count = 4
Active LUN paths = 2

...

LUN access type = T10 Asymmetric Active-Active
Asymmetric logical unit access supported = Both implicit and explicit

 

 

 

 

In this case you have an ALUA device, this means only the owner controller (2 pathes) is working, the other controller (2 pathes) is in standby. So you have multipathing across 2 pathes.


Hope this helps!
Regards
Torsten.

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