A hardware technician is installing 19 1U servers in a 42-unit rack. The technician needs to allocate enough space per server for optimal air flow. Which of the following unit sizes should be…

The correct answer is A. 1U. Each 1U server occupies exactly 1U of rack space by definition (1U = 1.75 inches). Installing 19 × 1U servers consumes 19U of the 42U rack, leaving 23U available. In a properly designed rack with hot/cold aisle containment and blanking panels filling all unused spaces, 1U…

Server hardware installation and management

Question

A hardware technician is installing 19 1U servers in a 42-unit rack. The technician needs to allocate enough space per server for optimal air flow. Which of the following unit sizes should be allocated per server?

Options

How the community answered

(57 responses)

A
91% (52)
B
2% (1)
C
5% (3)
D
2% (1)

Explanation

Each 1U server occupies exactly 1U of rack space by definition (1U = 1.75 inches). Installing 19 × 1U servers consumes 19U of the 42U rack, leaving 23U available. In a properly designed rack with hot/cold aisle containment and blanking panels filling all unused spaces, 1U servers do not require additional empty U space between them for airflow - the servers' front-to-back airflow design handles cooling at 1U density. Allocating 2U, 3U, or 4U per server would be wasteful and is not the standard practice for 1U form-factor equipment. The key to optimal airflow is using blanking panels in unused rack spaces (in the remaining 23U), not artificially spacing out the servers themselves.

Topics

#Rack Units#Server Installation#Airflow Management#Data Center Hardware

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