CPU / Affinity mask problem in SQL 2005

Posted by Robert Moir on Server Fault See other posts from Server Fault or by Robert Moir
Published on 2010-04-06T09:46:43Z Indexed on 2010/04/06 9:53 UTC
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sql-server

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sql-server-2005

Hi folks, Having a problem with a SQL Server which was virtualised. The CPU mask was set on the physical host for some reason and now advanced options are not available. So I need to reconfigure the CPU affinity mask settings - which are advanced options, so this is blocked because of the affinity mask issue.

I've tried doing this from the SQL server in single user command line mode, I've googled and found lots of people with similar problems but no real solution. I'm stumped. Any ideas?

Sample commands and output from query analyser below.

sp_configure 'show advanced options', 1 
GO
RECONFIGURE WITH OVERRIDE
GO
sp_configure 'affinity mask', 0x00000000
GO
RECONFIGURE 
GO

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

Configuration option 'show advanced options' changed from 0 to 1. Run the RECONFIGURE statement to install.

Msg 5832, Level 16, State 1, Line 1

The affinity mask specified does not match the CPU mask on this system.

Msg 15123, Level 16, State 1, Procedure sp_configure, Line 51

The configuration option 'affinity mask' does not exist, or it may be an advanced option.

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