StarTech.com 4-Bay Mobile Rack Backplane - Trayless Hot Swap Mobile Rack Backplane for 3.5in SAS II/SATA III - 6 Gbps HDD (HSB4SATSASBA) - storage mobile rack

Connect and hot swap four 3.5in SATA III or SAS II hard drives to your computer system in three 5.25" bays, with support for transfer speeds up to 6 Gbps. The HSB4SATSASBA Removable 4-drive Backplane makes inserting and removing drives fast and easy, by turning three 5.25" bays into a hot-swappable interface for up to four 3.5" SATA or SAS hard drives (HDD).
For added versatility, the hot swap bay can interface with SATA I/II/III and SAS I/II hard drives - an ideal solution for enterprise system applications.
For a quick and secure method of installing and removing drives, the backplane features ejection levers and a key-lock design. To help prevent drive failure, the bay provides drive cooling with a built-in fan and excellent heat dissipation with a vented aluminum enclosure.
The HSB4SATSASBA is backed by a StarTech.com 2-year warranty and free lifetime technical support.