KB 932755 was released recently and contains many changes to the Storport driver for better reliability and performance. If you've been seeing issues with Storport it might not be a bad idea to check out this article and see if your symptoms match up
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Read the complete post at http://blogs.technet.com/brad_rutkowski/archive/2007/04/13/storport-update-rolls-a-lot-of-changes-into-one-package-for-win2k3.aspx