Failover Array Mode 3 - suggestions?

Question

Current AIX 5.3 host running PowerPath 5.1 connecting to a Cx700 using Failover Mode 3(PAR). Other production AIX 5.3 hosts running PP 5.1 have standard Failover Mode set to 1(PNR)

Documentations states setting 3 can be used for AIX host "under very specific configuration parameters" having to do with non-disruptive upgrade on the CLARiiON.

Looking for more information on the "specific config parameters", and a recommendation on when to use this setting. Thanks!

rawstorage · Answer

Refer to Knowledge base article emc67186, this will give you all the specifics.

Conor · Answer

Download the document 'EMC Host connectivity guide for AIX' P289 has all the information you require about this failover mode setting and other AIX system requirements for NDU operations on the CLARiiON.

msumner1 · Answer

Thanks to all who have responded, I think I have all the info I need.

I looked up the recommended Primus article, and found plenty about an NDU on a CLARiiON and what CAN happen with an attached AIX 5.3 host...thank you, good recommended reading.

I referenced EMC Host Connectivity Guide for IBM AIX P/N 300-000-608 Rev A16, page 289 and the page only had a reference to HACMP configuration, leading to VSD's and recoverablility.

Did you mean page 250? - AIX Host Prep? Here it states the minimum config parameters including Failover Mode 3

It also states the PowerPath versions 4.5.1 or higher support NDU on a CLARiiON, I'm using PowerPath version 5.1, so I believe I should be safe.

thanks again...

Conor · Answer

Apologies, I was referencing a previous (older) version of the host connectivity guide... CB

PowerPath

Failover Array Mode 3 - suggestions?

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