Serial ata ide interface

SCSI is mainly used in the server market. While Fibre Channel is only used in high-end servers and is expensive. SATA is now the mainstream hard disk. Most notebook computers and desktop computers use it, and solid state hard drives also use it. SAS is generally used in servers.

It has fast transmission speed and strong reliability. Under the broad categories of IDE and SCSI, there has a variety of specific interface types that can be divided according to different technical specification and transmission speed. The full name of IDE is " Integrated Drive Electronics ", and its original meaning refers to the hard disk drive that integrates the "hard disk controller" and the "disk body".

This approach reduces the number and length of cables for the hard disk interface, enhances the reliability of data transmission, and makes hard disk manufacturing easier.

This type of interface has been eliminated with the development of technology. SCSI is not specifically designed for hard disks, but a high-speed data transmission technology widely used in minicomputers. It has the advantages of wide application range, multitask, large bandwidth, low CPU occupancy rate, and hot swap. So SCSI is mainly used in medium and high-end servers and high-end workstations.

But the higher price makes it difficult to popularize like IDE. SCSI also has some potential problems. It has limited system BIOS support, and it has to be set for each computer. There's also no common SCSI software interface. Figure 1. SCSI Interface. SCSI Version. Introduced in , supported synchronous and asynchronous SCSI peripherals. It is the standard currently in use.

It is not originally an interface technology developed for hard disk design and development, but specifically designed for network systems. However, as storage systems develop, they are gradually applied to hard disk systems.

Fibre Channel is developed to improve the speed and flexibility of multi-disk storage systems. And it greatly improves the communication speed of multi-disk systems. The main characteristics of Fibre Channel are: hot swap, high-speed bandwidth, remote connection, large number of connected devices, etc. It can meet the high data transmission rate requirements of high-end workstations, servers, mass storage sub-networks, and peripherals for bidirectional and serial data communication through hubs, switches and point-to-point connection.

Fiber Channel Protocol. Physical layer, customizes different media, set transmission distance and signal mechanism standards, defines optical fiber, copper interfaces, and cable indicators. Protocol mapping layer, which defines the interface between fibre channel and upper-layer protocol.

It is an interface used to connect ATA hard drives to a computer's motherboard. SATA adopts serial connection mode. Serial ATA bus uses embedded clock signal, which has stronger error correction ability. Compared with the past, its biggest difference is that it can check transmission instructions not just data. Errors are automatically corrected, which greatly improves the reliability of data transmission.

Now the general interface is SATA interfaces. Most of the computers we use are also SATA interfaces. The current SATA interface has three versions 1. The larger the version number, the later it appears, the better the performance, which mainly due to the faster data transfer rate. SATA 3. The SATA interface version is backward compatible, and the higher version is compatible with the lower.

Some SATA hard disks provide jumpers. Due to the jumper settings are different, the version number of the SATA interface of the same hard disk is different. In addition, the actual transfer rate of the interface requires the support of the SATA motherboard. SSD has better performance, smaller size, and higher interface requirements. High-performance SSDs have basically switched to M. It is still in mainstream market, especially the HDD market. The SATA 3. In , SATA 3. These subversion upgraded have not brought many new functions.

After all, the bottleneck of HDDs is not the speed, and it is difficult to make big improvements from the interface. SATA hard disk has a new design structure, fast data transmission, save space, and many other advantages over IDE hard disk:.

At that time, we will get a transfer rate nearly 10 times faster than IDE hard drives. And the transmission distance is long, which can be extended to 1 meter, making it easier to install equipment and wiring in the machine. Because the size of the connector is small, this kind of cable effectively improves the air flow inside the computer and also speedsthe heat dissipation in the case. SATA hard drives can work with mA of current. The BIOS will number it in the order of 1, 2, 3.

Whilethe IDE hard disk needs to set the master and slave disks through jumpers. IDE hard disks do not support hot swap. The M. Whether it is a smaller size or higher transmission performance, M. When buying M. It uses serial technology to obtain higher transmission speed and improves internal space by shortening the cable. This interface is designed to improve the performance, availability, and expandability of the storage system, and to provide compatibility with the SATA.

Specifically, the compatibility of the two is mainly reflected in the compatibility of the physical part and the protocol. As for the protocol, SAS is composed of three types of protocols, which use corresponding protocols for data transmission according to different devices. Due to the compatibility of the SAS system, users can use hard drives with different interfaces to meet the capacity or performance requirements of various applications. So they have more flexibility when expanding the storage system, allowing storage devices to maximize application benefits.

In the system, each SAS port can connect up to external devices, and SAS adopts a point-to-point serial transmission directly with a transmission rate of up to 3Gbps. It is estimated that there will be 6Gbps or even 12Gbps high-speed interfaces in the future. The SAS interface performance has also been greatly improved.

It also provides 3. Most expanders have 12 ports. With the use of serial cables, it not only can achieve a longer connection distance, but also improve the anti-interference ability. In addition, this cable can also significantly improve the heat dissipation inside the chassis. This is because when the AHCI mode is turned on, the number of useless seeks of the SSD can be greatly shortened and the data search time can be reduced.

So that the SSD under multi-tasking can exert all the performance and effects. However, with the gradual enhancement of SSD performance, these standards have also become a major bottleneck restricting solid state drives.

Because the AHCI standard designed for hard disk drives is not suitable for low-latency solid state drives. Another transmission protocol is the NVMe protocol that represents the future performance trend. The so-called NVMe protocol is to make full use of the low latency and parallelism of PCI-E channels, greatly improve the read and write performance of SSDs under controllable storage costs.

NVMe Specification. Fabric's NVMe Due to the flash memory particles and the main control, the SSD solid state drives price with M. So buy the corresponding level of solid state hard drive based on the configuration and requirements of the computer.

Otherwise it will cause performance waste. NVMe streamlines the calling method and does not need to read registers when executing commands. NVMe can support receiving commands and prioritizing requests from multi-core processors at the same time. NVMe has automatic power state switching and dynamic power management functions.

The device can switch to Power State 1 after being idle for 50ms from Power State 0. If it continues to be idle, it will enter Power State 2 with lower power consumption after ms. Best Portable Chargers. Best Phone Chargers. Best Wi-Fi Range Extenders. Best Oculus Quest 2 Accessories. Best iPad Air Cases. Awesome PC Accessories. Best Linux Laptops. Best Wireless iPhone Earbuds. Best Bluetooth Trackers.

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