upgrade 32 bit SQL Cluster

what needs to be considered and thought through for upgrading a 32 bit SQL Cluster to 64 bit?

Can you please share your experience on this?

any link or resource you come across on the above will be useful too.

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Raja Jegan RSQL Server DBA & Architect, EE Solution GuideCommented:
I would recommend to do the following:

1. Remove your 32 bit cluster and its resources
2. Create 64 bit cluster resources..
3. Take a backup of your existing SQL Server databases.
4. Remove SQL Server 32 bit clustered installation.
5. Create 64 bit clustered installation.
6. Install SQL Server using 64 bit cluster mode..
7. Restore your databases..

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anushahannaAuthor Commented:
Thanks for the detailed steps which is very helpful. If you yourself were doing the above on a 3-4 node cluster (with one passive), how much time would you estimate? for simplicity, we'll say there will be 4 databases on the active nodes each 100GB.
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Raja Jegan RSQL Server DBA & Architect, EE Solution GuideCommented:
Haven't done earlier myself..
But my approximate estimation would be around 2-3 days ( worst case scenario)

Note: It also depends upon the skill set of the person you have for doing this up-gradation and my estimation is for a medium level skilled person.
anushahannaAuthor Commented:
Raja Jegan RSQL Server DBA & Architect, EE Solution GuideCommented:
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