CompTIA Server+ (SK0-005)Server Hardware Installation and ManagementMedium
A server rack contains several high-density servers that generate a significant amount of heat. The data center currently uses standard perforated floor tiles for cold air delivery and exhausts hot air into a common plenum. To improve cooling efficiency and prevent hot spots, which of the following cooling strategies would be MOST effective?
- AReplace all perforated floor tiles with solid ones.
- BIncrease the overall room temperature to reduce cooling load.
- CInstall additional CRAC units without modifying airflow patterns.
- DImplement hot aisle containment.
Show answer & explanationAnswer & explanation
Correct answer: D. Implement hot aisle containment.
Hot aisle containment isolates the hot exhaust air from servers, preventing it from mixing with the cold intake air. This increases the temperature differential across the cooling units (CRACs), making them more efficient and effectively eliminating hot spots by ensuring all cold air is directed to server intakes and all hot air is returned to the CRAC without recirculation.
Why the other options are wrong
- A. Replacing all perforated floor tiles with solid ones would eliminate cold air delivery to the racks, exacerbating the problem.
- B. Increasing room temperature might save some energy but won't prevent hot spots if airflow is inefficient.
- C. Simply adding more CRAC units without addressing the airflow mixing will lead to inefficient cooling and potential hot spots elsewhere.
Hot Aisle Containment
A data center cooling strategy that physically encloses the hot aisles, preventing hot exhaust air from mixing with cold intake air and improving cooling efficiency.
- Isolates hot air
- Increases CRAC efficiency
- Reduces hot spots and recirculation
Memory trick: Containment keeps air apart, raised floors give a start, liquid cools where heat is high, CRAC units never lie.