Dell PowerEdge R420 Technical Manual

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The Dell PowerEdge R420 supports internal and external storage options and controllers, differentdrive 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 ortraditional solid-state drives.R420 has three chassis to support up to three different drive-bay options. 4 x 3.5-inch drive option (base config, cabled tray) 4 x 3.5-inch drive option (volume config, hot-plug tray; 2.5-inch hybrid kit available for 2.5-inchdrives) 8 x 2.5-inch drive option (maximum drive support in 1U, hot-plug tray)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 anup-to-date list of supported hard drives for the R420, see Dell.com/PowerEdge.FormfactorType Speed(rpm)CapacitiesNearline SAS* N/A 500G, 1TB, 1TB SEDSAS 10K 300GB, 600GB, 900GB, 900GB SEDSAS 15K 146GB, 300GB, 300GB SEDSAS SSD N/A 200GB, 400GBSATA SSD N/A 100GB, 200GBSATA* N/A 250GB, 500GB, 1TBSATA 7.2K 500GB, 1TB, 2TBNearline SAS 7.2K 1TB, 2TB, 3TBSAS 15K 300GB, 600GB* Applies to the 8-drive bay only.