DellDell PowerEdge R910 Technical Guide 5716 Rack Information16.1 OverviewThe ReadyRails™ sliding rail system for the R910 provides tool-less support for racks with square orunthreaded round mounting holes including all generations of Dell racks. The optional cablemanagement arm (CMA) can be mounted on either the left or right side of the sliding rails withoutthe use of tools for fast and easy deployment.IMPORTANT NOTES: The R910 is not compatible with any other Dell rails including previous generation rails, but itdoes use the same rails as the R810 & R815. The R910 supports sliding rails only. Static rails are not supported. Threaded hole racks require Dell’s fixed shelf or adapter brackets available fromRackSolutions. The CMA is not supported on racks that are less than 1m in depth including Dell’s 4200 & 2400racks.16.2 RailsThe ReadyRails sliding rails for the R910 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).Figure 23. R910 ReadyRails Sliding Rails with Optional CMAAs noted below, the R910 rails do not support mounting in threaded hole or 2-post racks*.Table 14. Rack Types Supported by the R910RailIdentifierMountingInterfaceRailTypeRack Types Supported4-Post 2-PostSquare Round Thread Flush CenterB2 ReadyRails™ Sliding √ √ X X X