Currently, there are four main interfaces supported :IDE, SCSI, SATA and SAS.

The IDE interface is the standard interface for ordinary PCS.

SCSI: small computer system interface, and SCSI is not specifically designed for the hard disk interface, a wide range of applications, low CPU usage, mainly used for servers.

SATA: Serial port is better and faster, the main PC, the use of SATA(Serial ATA) port hard disk is also called serial hard disk, is the mainstream of the current PC hard disk, serial ATA bus uses embedded clock signal, has a stronger error correction ability, improve the reliability of data transmission.The serial interface also has the advantages of simple structure and hot swap support.

SAS: SAS is a new generation of SCSI technology, which uses serial technology to obtain higher transmission speed, and SAS interface technology can be backward compatible with SATA. Due to the compatibility of SAS systems, IT personnel can use hard disks with different interfaces to meet the capacity or performance needs of various applications.