– Serial ATA (SATA) is a computer bus interface that connects host bus adapters to mass storage devices such as hard disk drives and optical drives.
– Serial ATA replaces the older AT Attachment standard (later referred to as Parallel ATA or PATA), offering several advantages over the older interface:
– reduced cable size and cost (seven conductors instead of 40 or 80)
– native hot swapping
– faster data transfer through higher signalling rates
– more efficient transfer through an (optional) I/O queuing protocol.