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Windows' performance monitor does a good job reporting how much I/O goes on at the LOGICAL level, but if you want to see physical disk I/O, then you need to get something that can drill into your specific raid controller.<br />

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Any specific counters that you recommend looking at on perfmon?
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Performance is fine for the current Exchange 2010 production system. &nbsp;I am just attempting to spec out a brand new system for a disaster recovery site. &nbsp;I would like to know what my current I/O is so that I can spec out a disk array for the new system.
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I am looking at creating a disaster recovery site for my Exchange 2010 implementation. &nbsp;The issue that I am running into is picking out a RAID that will be able to handle the I/O from Exchange 2010. &nbsp;What is the best way to determine how much I/O is being generated by my current system? &nbsp;I have a couple of different arrays that I am looking at and the only real difference that I am seeing between is cost and I/O capability. &nbsp;I want to make sure that I am picking the correct system to handle the I/O. &nbsp;I know in UNIX I would run iostat –xtc 15 &gt;&nbsp;/tmp/io.txt and looking at the information in there, but there are a lot more options in Windows 2008 Enterprise Edition SP2 for disk I/O. &nbsp;Which counter/counters are going to provide me the best information?
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I am looking at creating a disaster recovery site for my Exchange 2010 implementation.  The issue that I am running into is picking out a RAID that will be able to handle the I/O from Exchange 2010.  What is the best way to determine how much I/O is being generated by my current system?  I have a couple of different arrays that I am looking at and the only real difference that I am seeing between is cost and I/O capability.  I want to make sure that I am picking the correct system to handle the I/O.  I know in UNIX I would run iostat –xtc 15 > /tmp/io.txt and looking at the information in there, but there are a lot more options in Windows 2008 Enterprise Edition SP2 for disk I/O.  Which counter/counters are going to provide me the best information?

Disk I/O for Exchange 2010

Windows Server 2008 and Windows Server 2008 R2, based on the Microsoft Vista codebase, is the last 32-bit server operating system released by Microsoft. It has a number of versions, including including Foundation, Standard, Enterprise, Datacenter, Web, HPC Server, Itanium and Storage; new features included server core installation and Hyper-V.

Windows Server 2008

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.