ICYDOCK ToughArmor MB994SP-4SB-1

The Icy Dock ToughArmor MB994SP-4SB-1 is a fully metal four-bay mobile rack for 2.5-inch SATA hard drives and SSDs, with hot-swap support and SATA 6Gbps connectivity. It installs into a 5.25-inch drive bay, allowing drives to be exchanged while the system is running, which suits storage setups where drives are changed regularly.

Compared with the MB994SP-4S, this model offers only a SATA interface and includes a fan switch. It uses a single 4-pin power connector, which reduces the number of cables required. Two 40 mm fans provide airflow, and they can be switched on or off depending on whether you are using hard drives or SSDs. The unit detects a drive automatically and powers up only when one is present. Ventilation openings at the front and rear support airflow, and each bay has an LED that shows the status of its drive.