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windows 2000 upgrade

I have a server running windows 2000 advanced server sp4 that is currently in a cluster environment with data on a SAN.  I'd like to upgrade the server to windows 2003 server.  What is the standard practice for upgrading a server that is in a cluster?  I can just failover the drive that is on the SAN to the other server in the cluster, but is there anything else that I should worry about?  Will I loose my cluster data?
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pizza1
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pizza1
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oBdACommented:
The standard practice is a "rolling upgrade", which comes down to this: you pause the node to be upgraded, upgrade it, move the resources to the upgraded node, pause the second one, upgrade the second server.
Make sure that you have all necessary drivers at hand when upgrading, and that the BIOSs and firmwares of all(!) components (Mainboard, RAID, HBA, SAN, NICs, ...) involved are W2k3 compatible.
Check especially the "Related Links" at the bottom of this page:
Perform a rolling upgrade from Windows 2000
http://technet2.microsoft.com/windowsserver/en/library/49f2c886-685b-47f7-b9c4-1f5de50f36d41033.mspx?mfr=true
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pizza1Author Commented:
I don't plan on upgrading the other server in the cluster at the time.  Can I leave one on 2000 while the other is at 2003?

Thanks for your help.
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oBdACommented:
This is definitely *not* recommended. Running different OSs is only supported for a short while during an OS upgrade like this. The time you're running two nodes with different OSs should be as short as possible, as there are major changes to the resource DLLs (and, just in case, note that the web resource isn't supported anymore in W2k3, it has been replaced with a generic script resource).
I'm not even sure if all resources would fail back to the W2k server once they've been owned by the W2k3 machine.
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