DellPowerEdge R815 Technical Guide 4313 Rack Information13.1 OverviewThe ReadyRails™ sliding rail system for the Dell™ PowerEdge™ R815 provides tool-less support forracks with square or unthreaded round mounting holes including all generations of Dell racks. Theyalso support tooled mounting in 4-post threaded racks via an optional adapter brackets kit. Theoptional cable management arm (CMA) can be mounted on either the left or right side of the slidingrails without the use of tools for fast and easy deployment. It is important to note the following:• The PowerEdge R815 is not compatible with any other Dell rails including previous generationrails, but it does use the same rails as the R715, R810, and R910.• The PowerEdge R815 supports sliding rails only. Static rails are not supported.• Mounting in 2-post racks is not supported.• The CMA is not supported on racks that are less than 1m in depth including Dell’s 4200 and2400 racks.13.2 RailsThe ReadyRails sliding rails for the R815 support tool-less mounting in 19”-wide, EIA-310-E compliantsquare hole and unthreaded round hole racks and are available with or without the optional cablemanagement arm (CMA). See Figure 10.Figure 10. R815 ReadyRails Sliding Rails with Optional CMA