SATA (Serial ATA)
The connections on the SATA has data connection and power connector. SATA disks supply high amounts of data at very quick rates. SATA drives allows for better use of technology and provides quicker hard disks and use less power.SATA is the serial bus for mass storage devices and designed to replace the older parallel ATA interface. Has maximum net data transfer rate of 150 MBps. The advantage here is that the older configuration of pairs of hard disks as master and slave drives is no longer necessary.

 Sata Connectors on Mother Board



SCSI (Small Computer System Interface)
SCSI hard disks are similar to PATA but they differ in a few ways. The SCSI disks need a special controller to make them work. The SCSI models spin at a faster rate hence quicker in sending and receiving data. SATA can be used as part of a disk array.

SSD (Solid State Drives)
These drives are the future of computing storage - mainly because they have no moving parts like SATA or PATA. SSD consist of a spinning set of "platters" and a head that moves back and forth reading data as it spins past.