What are the performance metrics for the hard drive?

Hard Disk Interface

ATA Full Name Advanced Technology attachment, is the traditional 40-pin and port data cable connection between the motherboard and the hard disk, the maximum external interface speed of 133mb/s, because the same line of interference is too poor, and line space, adverse computer cooling, will gradually be Replaced by SATA.

Ide

IDE's English is all called "Integrated Drive Electronics", namely "Electronic Integrated Drive", commonly known as Pata and the mouth.

Sata

The use of SATA (serial ATA) port hard disk is also called serial hard disk, is the future of PC hard drive trend. In the 2001, the Serial ATA Commission, made up of Intel, APT, Dell, IBM, Seagate and Serial, officially established the ATA 1.0 specification, and in 2002, although serial ATA related equipment was not officially listed, serial The ATA Commission has preempted the Serial ATA 2.0 specification. Serial ATA uses serial connection, the Serial ATA bus uses the embedded clock signal, has the stronger error correcting ability, compared to the past its biggest difference is can carry on the transmission instruction (not only the data) to examine, if discovers the error will automatically correct, this greatly enhances the data transmission reliability. The serial interface also has the advantages of simple structure and hot-swappable support.

SATA2

Seagate joins the NCQ Local command array technology based on SATA and increases the disk speed.

SCSI is known as the small Computer system Interface (minicomputer systems Interface), after many generations of development, from early scsi-ii to current Ultra320 SCSI and Fiber-channel (Fibre Channel), There are also a variety of connector types. SCSI hard disks are widely used by workstation-level PCs as well as servers because of their speed, up to 15000 rpm, and low CPU computing resources for data transfers, but are also more expensive than ATA and SATA drives with the same capacity.

SAS (serial Attached SCSI) is a new generation of SCSI technology, and the same as SATA hard drives, is to take sequential technology to achieve higher transmission speed, to achieve 3gb/s. It also improves the internal space of the system by reducing the connecting line.

In addition, because SAS drives can share the same backplane as SATA hard drives, you can use SATA drives to replace some expensive SCSI hard drives on the same SAS storage system, saving overall storage costs.