SK0-004 · Question #112
A technician is installing a 2U rack mount server. The necessary rack space height to accommodate the server is:
The correct answer is C. 3.5 inches (.089 meter). One rack unit (1U) is defined as 1.75 inches by the EIA-310 standard, so a 2U server requires exactly 3.5 inches (approximately 0.089 meters) of vertical rack space.
Question
A technician is installing a 2U rack mount server. The necessary rack space height to accommodate the server is:
Options
- A2.5 inches (.064 meter).
- B3.0 inches (.076 meter).
- C3.5 inches (.089 meter).
- D4.0 inches (.10 meter).
How the community answered
(31 responses)- A3% (1)
- C90% (28)
- D6% (2)
Why each option
One rack unit (1U) is defined as 1.75 inches by the EIA-310 standard, so a 2U server requires exactly 3.5 inches (approximately 0.089 meters) of vertical rack space.
2.5 inches equals approximately 1.43U, which does not correspond to any whole rack unit increment defined by EIA-310.
3.0 inches equals approximately 1.71U, which is not a standard rack unit measurement and does not match the 2U specification.
The EIA-310 standard defines one rack unit (1U) as 1.75 inches (44.45 mm) of vertical height within a standard 19-inch rack. A 2U server therefore occupies 2 x 1.75 = 3.5 inches (0.0889 meters, rounded to 0.089 m), which accounts for both the chassis height and the standardized mounting rail pitch used across all EIA-compliant rack equipment.
4.0 inches equals approximately 2.29U, which exceeds the defined 2U height and does not conform to the EIA-310 rack unit standard.
Concept tested: EIA-310 rack unit (U) height standard for rack-mount servers
Source: https://www.eia.org/standards/
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