SQL I/O Stress Tool

Here is the link where you can download the SQLIOStress utility. The download has a 47-page white paper. This utility will simulate SQL Server disk I/O activity. You can use it to stress out the disk subsystem prior to the migration. You should add the -H option to the defaults to test more heavily stale reads.

http://support.microsoft.com/default.aspx?scid=kb;en-us;231619

Exchange I/O Stress Tools

Here is the link where you can dowload the LoadSim utility. The download has a 16-page white paper. This utility will generate mailbox infrastructure to allow for simulating disk I/O activity. You can use it to stress out the disk subsystem prior to the migration.

http://www.microsoft.com/downloads/details.aspx?familyid=92eb2edc-3433-47ca-a5f8-0483c7ddea85&displaylang=en

Here is the link where you can download the JetStress utility. The download has a 38-page white paper. Jetstress helps do this by simulating the Exchange disk I/O load. Specifically, Jetstress simulates the Exchange database and log file loads produced by a specified number of users. You can use it to stress out the disk subsystem prior to the migration.

http://www.microsoft.com/downloads/details.aspx?familyid=94b9810b-670e-433a-b5ef-b47054595e9c&displaylang=en

Generic I/O Stress Tool

Here is the link where you can download the IOMeter utility. There is documentation available at http://www.iometer.org/doc/documents.html. IOMeter is an I/O subsystem measurement and characterization tool for single and clustered systems. You can use it to stress the disk subsystem prior to the migration. However, limitations may not allow for the tool to stress a modern SAN architecture to upper performance limits.

http://www.iometer.org/doc/downloads.html