HP 2000 SAS SAN & HYPER-V and MPIO slow performance 2012 MS hotfix?

[david hood_2]

Hi

I saw this today MS KB and was wondering if I should be applying this to my Hyper-V 2012 cluster.

I haven't seen any performance issues however, it is early days for us migrating VMs to this new cluster.

we have a p2000 sas san with hyper-v cluster so I am unsure if I should be applying this. 

Can anyone advise?

Thanks

Dave

[PAC-MAN]

Hi David,

It is clear that MS recomends to change PSP only when slow performace noted during heavy workload in a direct attach SAN, Also from the article we see the issue occurs only with Round Robin. I also checked the latest firmware version TS250P002 released this month below is the revison history, but no fix related to PSP

The following issue was fixed in TS250P002:

• Fixed the problem with aborting Atomic Test-andSet (ATS) commands.
• Fixed the hanging controller issue that is seen during several iterations of the VMware Site Recovery Manager (SRM) failover and failback process.
• Fixed the Atomic Test-and-Set logic that set the incorrect error state condition and subsequently crash the array controllers.
• A trust failure no longer clears the partially reconstructed state of a HDD.
• Partner Firmware Update (PFU) now functions properly when the new Management Controller (MC) version matches the old MC version.
• All events are now properly processed by HP SIM.

If you face any performance issue we can try a different PSP. Also if you would like to update the firmware to latest please click here to download.

Hope this helps!

[david hood_2]

Hi,

thanks for the reply. 

What is PSP? I assume you dont mean proilaint support pack...

[david hood_2]

urh my bad. path selection...

we are currently using round robin, which the article suggest is affected. 

its just a new install so not much load yet, but I would hate to go back later saying "well there is this hotfix etc etc..."

So i'm guessing the recommendation from HP is not to apply?

[saiprasad]

Hi David 

As per the KB Article ,  the solution is 

"To resolve this issue, obtain updated firmware from your disk vendor. "

On P2000 SAS Array all the firmware releases have the capability of the load balancing at SAS port level. So it may not be relevant to this array.

However we have a latest controller firmware released for this array on July-12 . (TS250P002 )

http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareDescription.jsp?lang=en&cc=us&prodTypeId=12169&prodSeriesId=4118559&swItem=MTX-ee9a4b0cfa4f4c479c987ea3ba&prodNameId=4310834&swEnvOID=4138&swLang=8&taskId=135&mode=4&idx=2

Upgrade requirement to this version is :  " recommended " HP recommends users update to this version at their earliest convenience.

Thanks 

Sai