They draw cool air in from the right and vent hot air out the left. The enclosure walls, in an average cabinet, suffocate air flow. This would likely lead to processors, disks, and data being damaged due to thermal failures. Since average enclosures suffocate airflow, it is very difficult for hot spent air to leave the structure and cool air to enter. This causes other computers inside the cabinet eventually to draw the hot air in through their cool air vents.
Thermal failures are then imminent.
SharkRack's SharkSTOR solves these two problems with a cooling module that corrects air flow. Fresh cool air is drawn in from the front of the cabinet and is circulated through the computers. The hot spent air is captured and expelled out the rear of the cabinet. Six fans in the cooling module also increase the amount of fresh air being circulated through the array, ensuring all hot spent air is exhausted out the rear of the cabinet. Supplemental cooling module ito compensate for the Network Array side to side airflow.