Do AIX 5.3 servers need failover mode set to 3 when connecting to CX3 & CX4 Clarions ?

Make sure to check eLab to ensure the version of AIX you want to connect to your CLARiiON is a supported version.

Footnotes:
1. Updated 06/12/2009: For AIX, arraycommpath should be set to Enabled (1). Also see footnote 6.

6. Note PowerPath 4.5.0 is available by RPQ only, and earlier versions are EOL. The minimum version for NDU support is PowerPath 4.5.1.
• For AIX running PowerPath versions between 4.5.1 and 5.3 (no Service Pack), failovermode should be 3.
• For PowerPath 5.3 SP1 and above failovermode settings are as follows:

• FLARE 24 or earlier: failovermode MUST be set to 3
• FLARE 26 or later failover mode MUST be set to either 3 or 4:
  • failovermode may be set to 4 for ALUA behavior, or
  • failovermode may be set to 3 for active/passive behavior See PowerPath Release Notes for any further restrictions

7. For CLARiiON array support with DMP only, VxVM 4.0 MP2 and VxVM 4.0 MP3 require DGC-Clar version 3.0. DGC-Clar version 3.0 can be obtained on the Symantec web site, at the following link: http://seer.entsupport.symantec.com/docs/276079.htm

13. For AIX installations using VERITAS VxVM, set failovermode as follows:
• VERITAS VxVM 4.x or 5.x, with PowerPath: failovermode MUST be set as required by PowerPath
• VERITAS VxVM 4.x without PowerPath: failovermode MUST be set to 2
• VERITAS VxVM 5.0 MP1-RP3 or later: failovermode must be set to 1. Required for CLARiiON NDU support

Can someone please let me know how can i change the failovcer mode on the clariion array. What commands i need to run on the clariion.

Take a look at this thread:

https://community.emc.com/message/445142

glen