Dell MD1420 Hardware Owner's Manual

Figure 14. Securing the power cable
a. Velcro strap
CAUTION:
When connecting the power cable, secure the cable with the Velcro strap.
NOTE: If the enclosure is powered on, all the power supply LEDs remain off until the AC power cable is connected to
the power supply unit or cooling fan module and the power switch is turned on.
4. Turn on the power supply unit or cooling fan module.
About DC power supply units
An MD Series storage array receives its power from two power supply modules. In a DC-powered MD Series storage array, the power
supply module receives power from two 48 V DC PSUs. Each power supply module has two cooling fans.
NOTE:
The fans that keep the array cool are integrated into the power supply modules and cannot be replaced
separately. If a fan stops functioning, you must replace the entire power supply module.
Power indicator codes
The DC power supply module has LEDs that indicate power supply status. Under normal conditions, the power output and line input LEDs
are lit at the same time.
Figure 15. Power indicator codes
18
Installing enclosure components

Dell MD1420 Specifications

General

Form Factor	2U Rack-Mountable
Interface	12Gbps SAS
Hot-Swap Bays	Yes
Drive Bays	24 x 2.5"
Maximum Capacity	Up to 192TB
RAID Support	Depends on controller
Power Supply	Redundant power supplies
Cooling	Redundant cooling fans
Product Type	Storage Enclosure
Number of Controllers	0 (JBOD)
Compatibility	Dell PowerEdge servers