22 PowerEdge R520 Technical GuideExternal storageExternal storage for the R520 is available through optional HBAs for SAS, iSCSI and Fibre Channel.For more information, see Dell.com/Storage.Storage controllersDell provides highly capable RAID options for you to ensure that your data remains safe. Dell’s RAIDcontroller options offer impressive performance improvements, including the following features: FastPath™ I/O: This feature can help accelerate performance when operating on SSDs. Split mirror: This function allows you to break mirrored disk connection in order to quicklyreplace a drive. Physical disk power management (Dimmer Switch™): This feature allows for power control ofspare or idle drives, which can save energy and operating expenses.Supported RAID controllersThe newest line of PERC (PowerEdge RAID Controller) cards offer high I/O performance fordatabase applications and streaming digital media environments. The internal RAID controllers havea dedicated connection to the system board. The R520 supports the new PERC 8 family ofcontrollers with improved functionality and faster performance.The default PERC for the R520 is a mini-type PERC. The R520 also supports the new software RAIDsolution that supports RAID 0, 1, 5 and 10. The R520 supports the PERC cards listed in Table 12. Formore information about the latest PERC offerings, see Dell.com/PERC.Table 12. Supported RAID controllersController Description FeaturesRAIDmodessupportedFormfactorUsagemodelPERC H810ExternalEight-port,external 6Gb/sPCIe RAIDcontrollerIncludes 1GB NV DDR3cache, premiumperformance and feature set,security SED/EKMS and SSDas cache0, 1, 10, 5,50, 6, 60 Adapter PremiumperformancePERCH710PInternalEight-port,internal 6Gb/sPCIe RAIDcontrollerIncludes 1GB NV DDR3cache, premiumperformance and feature set,security SED/EKMS and SSDas cache0, 1, 10, 5,50, 6, 60Integratedmini-typePremiumperformancePERC H710InternalEight-port,internal 6Gb/sPCIe RAIDcontrollerIncludes 512MB NV DDR3cache, advanced feature set,security SED/EKMS0, 1, 10, 5,50, 6, 60Integratedmini-type Performance