Rosewill RSV-R4200U 4U Rackmount Server Chassis — 11x 3.5" Bays, 3x 2.5" Slots, ATX/CEB, 2 120mm + 2 80mm PWM Fans, USB-C 3.1, 2x USB 3.0, Front Lock

The Rosewill RSV-R4200U is a 4U rackmount server chassis built for dense storage and reliable airflow. Drive capacity includes 11 internal 3.5" HDD bays plus 3 additional 2.5" device slots for SSDs or smaller drives. Cooling comes pre-configured with 2x 120mm PWM fans at the front and 2x 80mm PWM fans at the rear to maintain consistent airflow. Expansion and motherboard support are flexible with 7 PCI slots and compatibility for ATX and CEB form-factor boards. Front I/O offers modern connectivity with a USB-C 3.1 port alongside 2 USB 3.0 ports, and the front panel features a lock and key for physical security.