Dell PowerEdge M820 Technical Manual page 21

The Dell PowerEdge M820 provides comprehensive internal storage options, including several drive
types and storage controllers to choose from.
Express Flash PCIe SSD is a new option that can provide vastly accelerated performance over
previous technologies. Dell Express Flash drives use PCIe lanes to connect directly to the processor
and chipset and are easily accessible by hot-plug drive bay.
The M820 is available in three different hard-drive backplane options. Table 10 lists the options for
backplanes, hard-drive controllers, and drive types for the M820.
Number
of drives
4
4
2
The M820 supports up to four 2.5-inch SAS or two 2.5-inch PCIe SSDs and shown in Table 11. For
the latest information on supported hard drives, visit Dell.com.
Form
Type
factor
Nearline SAS (6Gb)
SAS (6Gb)
SAS (6Gb)
2.5"
SAS SSD (SLC, 6Gb)
Express Flash PCIe
SSD (SLC)
Express Flash drives use PCIe and SSD technologies to provide performance, scalability, and optimal
serviceability. Accelerated performance with high IOPs is made possible without requiring processor
resources or capturing DRAM. Also, Express Flash drives use a standardized, 2.5-inch
hot-plug form factor, which allows a common management process for all drives.
PowerEdge M820 Technical Guide
21
Drive types Backplane
SAS HDD SAS
SAS HDD,
SAS (2)
Express Flash
PCIe SSD (2)
PCIe SSD
SAS HDD SAS
Speed
(rpm)
7.2K
10K
15K
N/A
N/A
Controller
MiniPERC card
MiniPERC card, PCIe extender
MiniPERC card
Capacities
500GB, 1TB, 1TB (SED)
300GB, 600GB, 900GB, 900GB (SED)
146GB, 300GB, 300GB (SED)
200GB, 400GB
175GB, 350GB