HP ProLiant SL270s HP Project Moonshot and the Redstone Development Server Pla - Page 5

Server trays Each 2U, half-width server tray holds 18 compute or storage cartridges that plug vertically into the server tray (Figure 2). The front of each server tray contains a single serial port interface and four 10 Gb SFP+ ports to route network signals out the front of the chassis. Figure 2: Up to 18 compute or storage cartridges plug vertically into the Redstone server tray. Optimized for compute Optimized for internal storage Compute cartridges Each compute cartridge contains four Calxeda EnergyCore SoCs that have their own dedicated memory and OS instance, so each cartridge holds four discrete servers (Figure 3). A single tray can hold up to 72 servers (18 cartridges x 4 SoCs per cartridge). Figure 3: A Redstone compute cartridge contains four separate servers that share power and cooling with other compute and/or storage cartridges in a chassis. 4 GB DRAM ECC mini-DIMMs 4 SATA ports per SoC Quad-core SoC Each compute cartridge contains: • Four EnergyCore SoCs with quad-core processors • Four mini-DIMM slots (one per SoC), each holding up to 4 GB ECC memory • Four micro SD ports (one per SoC) for optional local boot using standard micro SD cards • Four direct-attached SATA 3 Gb/s ports per SoC Storage cartridges If your application needs local storage, the Redstone Development Server supports optional storage cartridges. A storage cartridge consists of either two SFF HDDs (Figure 4) or two SFF SSDs. Each SoC can connect to four drives (two cartridges). This means a server tray fully optimized for storage would contain 16 storage cartridges and 2 compute cartridges. The drives are directly attached using cables between the drives and the SATA ports on the compute cartridge. 5