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06-26-2014 09:10 AM
06-26-2014 09:10 AM
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
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07-07-2014 11:49 PM
07-07-2014 11:49 PM
Re: How to verify the SAN load balancing software of the HP-UX server
#sar -L 1 5
will show you the lun path activating of disk.
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07-08-2014 12:07 AM
07-08-2014 12:07 AM
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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