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This article mainly introduces the differences between sas and sata, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let the editor take you to understand it.

The differences of sas sata are: 1, the compatibility is different, mainly reflected in the compatibility of the physical layer and the protocol layer; 2, the speed is different, the original SAS standard provides the data transmission speed of 300MB/s or 3Gb/second, while the speed of the SATA standard can only reach 150MB, the cost is different, and so on.

The difference between SAS hard disk and SATA hard disk

one。 Compatibility is different.

Specifically, the compatibility of the two is mainly reflected in the compatibility of the physical layer and the protocol layer.

1. At the physical layer, the SAS interface is fully compatible with the SATA interface, and the SATA hard disk can be used directly in the SAS environment. In terms of interface standards, SATA is a sub-standard of SAS, so the SAS controller can directly control the SATA hard disk, but SAS can not be directly used in the SATA environment, because the SATA controller can not control the SAS hard disk.

two。 In the protocol layer, SAS consists of three types of protocols, which are used for data transmission according to the different devices connected. Serial SCSI protocol (SSP) is used to transmit SCSI commands, SCSI management protocol (SMP) is used to maintain and manage connected devices, and SATA channel protocol (STP) is used for data transmission between SAS and SATA. Therefore, with the cooperation of these three protocols, SAS can be seamlessly integrated with SATA and some SCSI devices.

two。 The speed is different

The original SAS standard provides the data transmission speed of 300MB/s or 3Gb/second, while the maximum speed of SATA standard can only reach 150MB/s.

three。 The cost is different.

There is a big difference in price between SATA and SAS disks. SATA disks are cheap, while SAS disks are not cheap.

Expand the data

There are many other differences between SATA and SAS. For example, for enterprises, all these differences make SCSI a better technology than ATA and a better choice than ATA.

The SCSI command is very powerful and has been used in important applications for decades. SCSI includes features such as command sorting, which allows the controller to execute commands in the most efficient order, thereby improving performance. In the SCSI system, the data flow between the disk system and the computer is handled by a dedicated controller. In most SATA systems, this is done by CPU, which means that this process may be used to manage storage, such as running a database.

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