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Maximum number of LUNs, recommended size in EMC?

Posted on 2007-04-09
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Last Modified: 2008-02-01
Hi experts,

We are working on creating a file cluster and being that I'm unfamiliar with the EMC SAN we have, I figured I'd ask some questions...

First, my boss suggested to make multiple LUNs with say, 100GB size. He said that the SAN chokes if you have instead, a single big LUN of say, the 2TB we need. I always thought that the SAN was smart enough to figure out the allocation of resources without having to split up the LUNs into smaller sizes.

Secondly, what is the maximum number of LUNs that Windows 2003 supports? It was the question he originally had for me, and the one to which I don't have an answer either.

Thanks for any insight, and any further information would be greatly appreciated.
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Question by:PNJIT
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pmarquardt earned 2000 total points
ID: 18885154
You are limited to the number of drive letters Windows will support. Since you lose A-B-C-D automatically (assuming you have a floppy and CD or DVD) then you are left with 22 letters. That is, if you decide to use drive letters. Windows 2K required the use of drive letters, but 2K3 does not. You can use mount points.

Microsoft has a specific article covering this material here: http://technet2.microsoft.com/WindowsServer/en/library/1dadc519-5cb1-4ac4-89cc-800e2e7066b71033.mspx?mfr=true
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by:pmarquardt
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Thank you!
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