• Large data-storage capacity and hot-swap capabilityWith the hot-swap feature, you can add, remove, or replace hard disk drives without turning off the server.Storage capacity is different depending on server model. See “Technical specifications” on page 3 formore information.• Lightpath DiagnosticsLightpath Diagnostics provides LEDs to help you diagnose problems. For more information about theLightpath Diagnostics, see “System LEDs and diagnostics display” on page 25.• Redundant networking connectionThe Lenovo XClarity Controller provides failover capability to a redundant Ethernet connection with theapplicable application installed. If a problem occurs with the primary Ethernet connection, all Ethernettraffic that is associated with the primary connection is automatically switched to the optional redundantEthernet connection. If the applicable device drivers are installed, this switching occurs without data lossand without user intervention.• Redundant coolingThe redundant cooling by the fans in the server enables continued operation if one rotor of a fan fails.• ThinkSystem RAID supportThe ThinkSystem RAID adapter provides hardware redundant array of independent disks (RAID) supportto create configurations, supporting RAID levels 0, 1, 5, 6, 10, 50, and 60.Tech TipsLenovo continually updates the support website with the latest tips and techniques that you can use to solveissues that your server might encounter. These Tech Tips (also called retain tips or service bulletins) provideprocedures to work around issues or solve problems related to the operation of your server.To find the Tech Tips available for your server:1. Go to http://datacentersupport.lenovo.com and navigate to the support page for your server.2. Click on How To’s from the navigation pane.3. Click Article Type ➙ Solution from the drop-down menu.Follow the on-screen instructions to choose the category for the problem that you are having.Security advisoriesLenovo is committed to developing products and services that adhere to the highest security standards inorder to protect our customers and their data. When potential vulnerabilities are reported, it is theresponsibility of the Lenovo Product Security Incident Response Team (PSIRT) to investigate and provideinformation to our customers so they may put mitigation plans in place as we work toward providingsolutions.The list of current advisories is available at the following site:https://datacentersupport.lenovo.com/product_security/homeSpecificationsSummary of the features and specifications of the server. Depending on the model, some features might notbe available, or some specifications might not apply. The latest specifications information is always availableat https://lenovopress.lenovo.com/.2 ThinkSystem SR665 V3 System Configuration Guide