11gR2 documentation bug 11787630 with ADR, DRA and RAC.

From: David Robillard <david.robillard@xxxxxxxxx>
To: "D'Hooge Freek" <Freek.DHooge@xxxxxxxxx>
Date: Fri, 18 Feb 2011 14:14:05 -0500

Hello Freek,

MOS finally got back to me with the answer on the documentation
problem we found. Quick recap:

Data Recovery Advisor (DRA) doesn't support RAC databases, but the
11gR2 documentation says we should modify our ADR structure in order
to use DRA with RAC.

Just why is one documentation [1] saying we should configure ADR on
shared storage with RAC so that we can use DRA while the other [2]
says DRA is not supported with RAC is beyond me!

I'll ask Oracle support and see what they think?

Short answer: there is a bug in the documentation.

Long answer:

<MOS answer>
Hello David,

I got feedback and clearification from our Product Management
regarding the mismatch in the Oracle Documentation.

the Answer is:
--------------

-> DRA - Data Recovery Advisor - is "NOT" supported for RAC!

--------------

So this Documentation is 'wrong'.

http://download.oracle.com/docs/cd/E11882_01/server.112/e17120/diag001.htm#CHDHDIDD

Oracle Database Administrator's Guide
11g Release 2 (11.2)
Part Number E17120-06

ADR in an Oracle Real Application Clusters Environment

o In an Oracle Real Application Clusters (Oracle RAC) environment,
each node can have ADR base on its own local storage,
  or ADR base can be set to a location on shared storage. The
following are the advantages of the shared storage approach:
  You can use ADRCI to view aggregated diagnostic data from all
instances on a single report.

!The following is WRONG!
~~~
o You can use the Data Recovery Advisor to help diagnose and repair
corrupted data blocks, corrupted or missing files,
  and other data failures. (For Oracle RAC, the Data Recovery Advisor
requires shared storage.)
~~~

This Part with: "DRA - Data Recovery Advisor" - is 'Wrong' in  "Oracle
Database Administrator's Guide"
and I entered a Documentation Bug:11787630  to get this
removed/corrected in the Documentation

Documentation Bug:
------------------
Bug 11787630 - DRA - DATA RECOVERY ADVISOR - IS "NOT" SUPPORTED FOR RAC!

Regards
Bernhard
(please close SR if this answered your question, thank you )
</MOS answer>

I hope this can help clarify the issue.

Cheers,

David

[1] 
http://download.oracle.com/docs/cd/E11882_01/server.112/e17120/diag001.htm#CHDHDIDD
[2] 
http://download.oracle.com/docs/cd/E11882_01/backup.112/e10642/rcmrepai.htm#CHDCDHFD
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11gR2 documentation bug 11787630 with ADR, DRA and RAC.

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