SAS expansion topology for RAID data storage including multiplexers and SAS expanders for interfacing with single or dual ports drives

摘要

A data storage system having a first chassis, such first chassis having a pair of SAS expanders and a second chassis having a pair of SAS expanders. The first one of the pair of SAS expanders is connected to only an expansion port of a first one of a pair of signal processor printed circuit boards in the first one of the chassis. An expansion port of a second one of the pair of SAS expander is connected to only the expansion port of a second one of the pair of signal processor printed circuit boards in the second one of the chassis.