21 PowerEdge R420 Technical Guide
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
2.5”
Nearline SAS
* N/A 500G, 1TB, 1TB SED
SAS 10K 300GB, 600GB, 900GB, 900GB SED
SAS 15K 146GB, 300GB, 300GB SED
SAS SSD N/A 200GB, 300GB
SATA SSD N/A 100GB, 160GB, 200GB, 400GB, 600GB
SATA* N/A 250GB, 500GB, 1TB
3.5”
SATA 7.2K 500GB, 1TB, 2TB, 3TB, 4TB
Nearline SAS 7.2K 1TB, 2TB, 3TB, 4TB
SAS 15K 300GB, 600GB
*
Applies to the 8- drive bay only.
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