Chenbro's RM23508M2-L Server chassis provides 8 hot-swap 3.5" 6Gb/s SAS/SATA hard drive bays with 6Gb/s mini-SAS in an efficient 2U form factor designed for most server applications. The chassis does not come with a pre-installed power supply unit, however, it supports a 2U single or 1+1 Redundant PSU which can be purchased separately.