Dell PowerEdge R420 Technical Guide - Page 21

6 Storage The Dell PowerEdge R420 supports internal and external storage options and controllers, different drive types, and different chassis configurations for a varied number of drives. Features such as CacheCade™ provide accelerated performance over previous technologies. CacheCade uses Dell PERC storage controllers to accelerate performance over hard drives or traditional solid- state drives. Internal storage R420 has three chassis to support up to three different drive- bay options. • 4 x 3.5- inch drive option (base configuration, cabled tray) • 4 x 3.5- inch drive option (volume configuration, hot- plug tray; 2.5- inch hybrid kit available for 2.5- inch drives) • 8 x 2.5- inch drive option (maximum drive support in 1U, hot- plug tray) Supported hard drives The R420 supports up to eight 2.5- inch or four 3.5- inch hard drives or solid- state drives. Self- encrypting drives (SED) are available. Table 11 lists more information about these drives. For an up- to- date list of supported hard drives for the R420, see Dell.com/PowerEdge. Table 11. Supported hard drives Form factor Type Speed (rpm) Capacities Nearline SAS* N/A 500G, 1TB, 1TB SED SAS 10K 300GB, 600GB, 900GB, 900GB SED SAS 2.5" SAS SSD 15K 146GB, 300GB, 300GB SED N/A 200GB, 300GB SATA SSD N/A 100GB, 160GB, 200GB, 400GB, 600GB SATA* N/A 250GB, 500GB, 1TB SATA 7.2K 500GB, 1TB, 2TB, 3TB, 4TB 3.5" Nearline SAS 7.2K 1TB, 2TB, 3TB, 4TB SAS * Applies to the 8- drive bay only. 15K 300GB, 600GB 21 PowerEdge R420 Technical Guide