SAS-sATA A24S-G2130-M5, 4U 24-bay rackmount, single controller ASIC400 with 512MB DDR RAM and BBU, RAID6. Dual SAS host channels (IN-OUT port for each channel, total 4 SAS ports), sATA drive channels, with SAS expansion port in each controller. Redundant PSUs and redundant FANs with LCD front panel.