Use this information for installation details about the 42U Enterprise and 42U Enterprise Expansion Racks.
The Lenovo 42U Enterprise Primary rack is an industry-standard rack that supports rack-mountable System x servers and options.
The Lenovo 42U Enterprise Expansion rack is an industry-standard rack that complements the Lenovo Dynamic Standard Rack with additional rack-mounting space.
To verify the options that work with this rack, go to http://static.lenovo.com/us/en/serverproven/index.shtml.