SAS or Serial Attached SCSI, isan evolution of parallel SCSI into a point-to-point serial peripheral interface in which controllers are linked directly to disk drives. SAS is a performance improvement over traditional SCSI because SAS enables multiple devices (up to 128) of different sizes and types to be connected simultaneously with thinner and longer cables; its full-duplex signal transmission supports 3.0Gb/s. In addition, SAS drives can be hot-plugged.

Serial ATA is the next-generation internal storage protocol, designed to replace parallel ATA technology. The Serial ATA-1 standard supports up to 150MBytes/sec, with a roadmap already planned for 300MBytes/sec and as high as 600MBytes/sec for the next stage. The key benefits of Serial ATA are: Increased reliability due to the elimination of cross-talk, hot-swap support, point-to-point usage. Especially for engineers struggling with BIOS settings and configuring master/slave and primary/secondary, this last advantage is a welcome change.

Serial ATA is the next-generation internal storage protocol, designed to replace parallel ATA technology. The Serial ATA-1 standard supports up to 150MBytes/sec, with a roadmap already planned for 300MBytes/sec and as high as 600MBytes/sec for the next stage. The key benefits of Serial ATA are: Increased reliability due to the elimination of cross-talk, hot-swap support, point-to-point usage. Especially for engineers struggling with BIOS settings and configuring master/slave and primary/secondary, this last advantage is a welcome change.