SR550/SR590/SR650 3.5" SATA/SAS 12-Bay Backplane Upgrade Kit
Lenovo 4XH7A08771. Product type: HDD enclosure. Number of storage drives supported: 12, Storage drive size: 3.5", Supported storage drive interfaces: PCI Express 3.0. Product colour: Metallic
Models without any drive bays that are based on the 12x 3.5" chassis (feature code AV0Q) include the Right EIA Latch with FIO (USB ports, status LEDs, and a power button). These models support adding drive bays by using the 3.5" 8-drive backplane kit (4XH7A08770) or 3.5" 12-drive backplane kit (4XH7A08771).