3405 SATA/SAS Unified Serial RAID Kit. -- Choose an Adaptec Unified Serial controller to leverage cost-effective, high-capacity Serial ATA (SATA) disk drives or high-performance Serial Attached SCSI (SAS) drives, or both, in a single storage system. Now, its possible to create solutions that are closely tailored to business needs today and also make upgrading or reallocating storage as simple as swapping disks. For expanding a SCSI infrastructure, simply install an Adaptec Unified Serial controller in your server and as your data grows, take advantage of massive scalability up to 128 devices, or up to 60TB (using 500 GB drives).