Table 9. Supported drive options for the PowerEdge C6420 sled
Maximum number of drives in the enclosure Maximum number of drives assigned per sled
12 x 3.5-inch drive systems Three SAS or SATA hard drives and SSDs per sled
24 x 2.5-inch drive systems Six SAS or SATA hard drives and SSDs per sled
24 x 2.5-inch drive systems with NVMe The NVMe backplane supports either of these congurations:
• Two NVMe drives and four SAS or SATA hard drives and SSDs
per sled
• Six SAS or SATA hard drives and SSDs per sled
M.2 SATA drive (optional) The supported capacity of the M.2 SATA card is 120 GB.
NOTE: The M.2 SATA card can be installed on the x8 (slot
1) mezzanine riser or the x16 riser slot (slot 5).
SDHC Card (optional) for boot (up to 64 GB) One on each PCIe riser of each sled
Environmental specications
Temperature specications
Table 10. Temperature
specications
Temperature Specications
Storage –40°C to 65°C (–40°F to 149°F)
Continuous operation (for altitude less than 950 m or 3117 ft) 10°C to 35°C (50°F to 95°F) with no direct sunlight on the
equipment.
Fresh air For information about fresh air, see Expanded Operating
Temperature section.
Maximum temperature gradient (operating and storage) 20°C/h (36°F/h)
NOTE: Some congurations require a lower ambient temperature for more information, see the Standard operating temperature
specications.
Relative humidity specications
Table 11. Relative humidity
specications
Relative humidity Specications
Storage 5% to 95% RH with 33°C (91°F) maximum dew point. Atmosphere
must be non-condensing at all times.
Operating 10% to 80% relative humidity with 29°C (84.2°F)
20 Dell PowerEdge C6400 Installation and Service Manual
Technical specications