This question comes to me, after reading this blog on MSDN, http://blogs.msdn.com/b/san/archive/2011/08/15/the-windows-disk-timeout-value-understanding-why-this-should-be-set-to-a-small-value.aspx

And I also learned Exchange 2010 and its SP1 has made change on it IO behavior and MS recommend set TimeOutValue to 20s on DAS and SAN or follow HW vendor’s recommendation.

I like to know what’s EMC recommend value on it? And if a Exchang on EFD, could we have a less value to have better performance?

Thanks,

Eddy