11i v3 and SAN

[swaggart]

Hi

We have just installed our first server (rx6600) with 11i v3 and assigned one SAN lun of 30 Gb to it.
We are experiencing really bad performance on the SAN disk, and can't seem to figure out why.

Does anybody have any similar experience on 11i v3, or tips on things to look for ?

[Torsten.]

Question first: What is your "SAN"? Details?

[swaggart]

Don't know much about this.
Just that we are using what we call Clarion "midrange" disks og type CX3-80WDR5.
It's a large Enterprise SAN with several hundered servers using the same SAN.

We first tried with 4 paths to the disk, but reduced it to 2 after someone pointed out that HPUX likes this better.

Hope this helps.

[Duncan Edmonstone · Accepted solution]

I'd be interested to know who pointed out that HPUX likes "2 paths better". I'm not aware of that as a best practice or reccomendation. As to your problem, is your Clariion on at least R26 of firmware? It needs to be before it can talk to 11iv3 as it needs to support ALUA. Additonally you need to use the new failover mode 4.

Read more in the following posts:

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=1135213

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=1135211

HTH

Duncan