Supermicro's extensive range of rackmount storage server solutions provides exceptionally high storage density, while leveraging Gold/Platinum Level (93% ~ 94%+) high-efficiency power supplies, high-capacity hot-swappable 2.5" and 3.5" SAS/SAS2/SATA HDDs, and 100% cooling redundancy to maximize performance-per-watt savings and reduce total cost of ownership (TCO). The product line includes 2U, 3U, and 4U form factors, with each server capable of supporting up to 7 PCI expansion slots and Supermicro's wide line of DP, UP and MP serverboards. In addition to SAS/SAS2 controllers embedded on various Intel & AMD-based motherboards, we have a variety of 3Gb/s and 6Gb/s SAS/SAS2 Add-On Cards, which can be found here. With direct attached HDD backplane (TQ version), multi-lane backplane (A version) and SAS/SAS2 expander (E version) backplanes available for application-specific solution optimization, Supermicro storage servers are designed to meet the requirements of today's sophisticated enterprise data centers and high performance applications with new levels of storage performance, accessibility, scalability and reliability.