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Dell MD2412 and MD2424 Direct-Attach Storage for PowerEdge Servers: руководство по обслуживанию
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Dell MD2412 and MD2424 Direct-Attach Storage for PowerEdge Servers: руководство по обслуживанию

Technical specifications

This section describes the technical specifications of the MD2412 and the MD2424 enclosures.

Enclosure dimensions

Table 1. Enclosure dimensions2U12 and 2U24 enclosure dimensions
Specification MD2412 MD2424
Height 2U

86.8 mm (3.4 in.)

 2U

86.8 mm (3.4 in.)
Width 444 mm (17.5 in.) 444 mm (17.5 in.)
Depth 545 mm (21.5 in.) 497 mm (19.5 in.)

Enclosure weights

Table 2. Enclosure weightsWeight of the 2U12 and 2U24 enclosures
Component MD2412 MD2424
Storage enclosure (empty) 9.5 kg (21 lb) 9.2 kg (20.25 lb)
Drive with carrier (each) 0.8 kg (1.76 lbs) 0.24 kg (0.53 lbs)
EMM (each) 2.43 kg ( 5.36 lb) 2.52 kg ( 5.55 lb)
PSU (each) 0.81 kg (1.79 lb) 0.89 kg (1.96 lb)
System without drives 15.98 kg (35.23 lb) 16.0 kg (35.27 lb)
System with all drives installed 25.58 kg (56.39 lb) 21.76 kg (47.99 lb)
NOTE:
  • Weights that are shown are nominal, and subject to variances.
  • Weights may vary due to different canisters and power supplies; and differing calibrations between scales.
  • Weights may also vary due to the number and type of disk drives (SAS or SSD) installed.

Environmental requirements

Table 3. Ambient temperature and humidityAmbient temperature and humidity
Specification Temperature range Relative humidity Max. Temperature Gradient
Operating 0°C to 40°C (32°F to 104°F) 8% to 85% non-condensing 20°C per hour
Operating (ASHRAE A3) 5°C to 40°C (41°F to 104°F) 8% to 85% non-condensing 20°C per hour
Non-operating -40°C to +65°C (-40°F to +149°F) 10% to 95% non-condensing -
Table 4. NEBS operating temperature requirements1NEBS operating temperature requirements
Specification Temperature range Relative humidity Max. Temperature Gradient
Operating - altitude less than or equal to 1829 meters (6000 ft) 5°C to 40°C (41°F to 104°F) 5% to 85% non-condensing 30°C per hour
Short term 2 -5°C to 50°C (23°F to 122°F) 5% to 93% not to exceed 0.026 kg water/kg of dry air -
Short term with fan failure -5°C to 40°C (23°F to 104°F) - -

1 This table is a high-level summary of NEBS requiremetns. For a complete list of requirements see NEBS GR-63-CORE. All other requirements found in GR-63-CORE also apply.

2Short-term refers to a period of not more than 96 consecutive hours and a total of not more than 15 days in 1 year. (This refers to a total of 360 hours in any given year, but not more than 15 occurrences during that 1-year period.)

Table 5. Other environmental requirementsEnvironmental requirements
Specification Measurement or description
Altitude, operating 900 meters @ 45°C ; 3050 meters @ 33°C
NOTE:Ramp Altitude at 3.81m/s and temperature at 20˚C/Hr
Altitude, non-operating Maximum 12,000 m (39,370 ft)
Shock, operating 6.0 g, 11 ms. Four shocks positive and four negative in each of 3 axes, 24 total shocks.
Shock, non-operating square shock 25g, 3ms. Three shocks positive and three negative in each of 3 axes, 18 total shocks.
Shock, non-operating half sine shock 50g, 2ms. One time per face (except front and rear face), total 4 shocks.
Vibration, operating 0.21 Grms 5 Hz–500 Hz random; 10 minutes/axis
Vibration, non-operating, random chassis 0.47 Grms; 4–5 00Hz; vertical axis; random; 90 minutes per axis

0.39 Grms; 4–500Hz; horizontal axis; random; 30 minutes per axis
Vibration, non-operating, random rack 0.88 Grms; 2–200Hz; random; minutes in normal shipping orientation
Vibration, transporting 1.15Grms 1 ~–200 Hz; 4 sides (bottom, top, left, right). 30 minutes per side based on ISTA 2A Standard
Acoustics Operating sound power ≤ 8.0 Bels LWAd (@ 23 ± 2°C )

Power-on and reset

The firmware boot time from power-on reset or soft reset to SMP target readiness is typically less than two minutes. Actual boot time may vary depending on your specific configuration.

Power supply unit

Table 6. AC Power supply unit specificationsAC power supply unit specifications
Specification Measurement
Maximum output power 800 W
Voltage
  • Low line 100-127 VAC
  • High line 200-240 VAC
  • 240 VDC (China only)
Frequency 50/60 Hz
Holdup time 10 ms
Inrush current 55 A (maximum)
Leakage current 0.875 mA (maximum)
Efficiency 230 VRMS
  • >90% @ 10% load
  • >94% @ 20% load
  • >96% @ 50% load
  • >92% @ 100% load
Power factor 115 Vac 50Hz/240 Vac 60 Hz
  • >0.90 @ 5%-10% load
  • >0.96 @ 20% load
  • >0.98 @ 50% load
  • > 0.99 @ 100% load
iTHD Maximum iTHD%
  • <20% @ 5%-10% load
  • <15% @ >10% load
  • ≤10% @ ≥20% load
  • ≤8% @ ≥40% load
  • ≤5% @ ≥50% load
Table 7. DC Power supply unit specificationsDC power supply unit specifications
Specification Measurement
Voltage –40 VDC to –72 VDC (-48 VDC nominal)
Leakage current 3.5 mA (maximum)
  • The MD24 Series enclosure using a DC power supply is suitable for installation as part of the common bonding network (CBN) of an isolated bonding network (IBN) or both.
  • The battery return (BR) input for each DC-powered product is isolated from the MD24 Series enclosure common DC return.