Serial Advanced Technology Attachment (SATA, IPA: /ˈseɪtə/, /ˈsætə/ or 'sɑrtə) is a computer bus primarily designed for transfer of data between a computer and mass storage devices such as hard disk drives and optical drives.
The main advantages over the older parallel ATA interface are faster data transfer, ability to remove or add devices while operating (hot swapping), thinner cables that let air cooling work more efficiently, and more reliable operation with tighter data integrity checks.
It was designed as a successor to the Advanced Technology Attachment standard (ATA), and is expected to eventually replace the older technology (retroactively renamed Parallel ATA or PATA). Serial ATA adapters and devices communicate over a high-speed serial cable.
SATA cable connection on motherboard
SATA connection on harddisk