This 25 sff sas 15k drive offers the advanced sas 20 interface and operates at 6 gbs transfer rates sas 20 provides the next generation of signal and data integrity features making sas ideally suited for use in high end network storage applications the sas 20 feature set and 6 gbs transfer rate supports larger topologies by connecting more expanders host bus adapters and raid controllers within or across more storage arrays by communicating over longer distances with high signal integri