9 PowerEdge R820 Technical GuideFeature PowerEdge R820 technical specificationDell OpenManageSystems Management(Agent-free or withOpenManage ServerAdministrator [OMSA]Agent) OpenManage Essentials OMSA Agent OpenManage Power Center (requires iDRAC7 Enterprise with LifecycleController) OpenManage Integrations and Connections:> OpenManage Integration Suite for Microsoft® System Center> OpenManage Integration for VMware vCenter™> Connections for HP® Operations Manager, IBM® Tivoli® Netcool® and CANetwork and Systems Management iDRAC7 Express with Lifecycle Controller (standard option)> Upgrade to iDRAC7 Enterprise with Lifecycle Controller> Upgrade to 8GB vFlash media or 16GB vFlash media for iDRAC7Enterprise with Lifecycle Controller> Trial evaluation available for IDRAC7 Enterprise with Lifecycle ControllerRack supportReadyRails™ sliding rails for tool-less mounting in 4-post racks with square orunthreaded round holes or tooled mounting in 4-post threaded hole racks, withsupport for optional tool-less cable management armReadyRails static rails for tool-less mounting in 4-post racks with square orunthreaded round holes or tooled mounting in 4-post threaded and 2-post(Telco) racksOperating systemsMicrosoft Windows Server® 2012Microsoft Windows Server 2012 R2 (includes Hyper-V®)Microsoft Windows Server 2008 R2 SP1, x64 (includes Hyper-V)Novell® SUSE® Linux Enterprise ServerRed Hat® Enterprise Linux®Virtualization options:Citrix® XenServer®VMware vSphere including ESXi™Red Hat Enterprise Virtualization®For more information on the specific versions and additions, visitDell.com/OSsupport.1GB means 1 billion bytes and TB equals 1 trillion bytes; actual capacity varies with preloaded material and operatingenvironment and will be less.