Mobile hard disks are divided into four types according to external interfaces: parallel interface, USB interface, IEEE 1394 interface and SATA interface. Most of their built-in interfaces are IDE interfaces, which are used with hard disks with IDE interfaces.
These four types of interfaces have the following characteristics:
1, parallel port (ATA interface) hard disk box is the earliest hard disk box, which is connected to the computer through the parallel port of the computer. Its characteristics are relatively fast transmission speed and low price, but the disadvantage is that it is inconvenient to install and use and requires an independent switching power supply.
2. mobile hard disk box of 2.USB interface is the mainstream at present, and its biggest advantage is that it is easy to use and supports hot plug;
3.IEEE 1394 interface, also known as Friewire interface (commonly known as "Firewire" in Chinese), has high data transmission rate, and IEEE 1394a interface can provide 100Mbps, 200Mbps, 400Mbps and other transmission formats; IEEE 1394b can provide data transmission rate of 800Mbps. IEEE 1394 was originally an interface on Apple computers, but it is relatively rare on ordinary desktop computers.
4.SATA interface adopts 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) and automatically correct errors when found, which greatly improves the reliability of data transmission.
MobileHarddisk, as its name implies, is a storage product that uses hard disk as storage medium, exchanges large-capacity data between computers, and emphasizes portability. The vast majority of mobile hard disks in the market are based on standard hard disks, and only a few are micro hard disks (1.8 inch hard disks, etc. ), but the price factor determines whether the mainstream mobile hard disk is based on the standard notebook hard disk.
Because the hard disk is used as the storage medium, the data reading and writing method of the mobile hard disk is the same as that of the standard IDE hard disk. Mobile hard disks mostly use faster transmission interfaces such as USB, IEEE 1394, which can transmit data with the system at a higher speed. As of 2009, the reading speed of mainstream 2.5-inch brand mobile hard disk is about 15-25MB/s, and the writing speed is about 8-15mb/s. ..
How to choose a mobile hard disk?
How to choose a mobile hard disk:
1, capacity
When choosing a mobile hard disk, we need to choose the capacity according to the corresponding function. Generally speaking, the larger the capacity, the better the mobile hard disk will be, and the transmission speed will be faster. At the same time, capacity is also the primary criterion for selecting mobile hard disks. The capacity of personal mobile hard disk is generally in the range of 320GB-3TB. Specifically: 320GB, 500GB, 1TB, 2TB, 3TB.
Step 2 connect
The interface of mobile hard disk is good or bad, which determines the transmission speed to some extent. At present, there are three common interfaces on the market. The mainstream interface of mobile hard disk is usb3.0, generally blue interface. Theoretically, the maximum transmission bandwidth of USB3.0 is as high as 5.0Gbps, while that of USB2.0 is 480Mbps. Because the transmission speed of USB3. 1 is relatively fast, this kind of mobile hard disk is expensive, so you can choose it according to your needs when you buy it.
Step 3 size
At present, the common mobile hard disks are divided into 3.5-inch and 2.5-inch sizes, which are the traditional standards for notebook hard disks and desktop notebooks respectively. Among them, the 2.5-inch mobile hard disk is composed of notebook hard disk and hard disk box, which requires a small amount of driving power and can be directly used by plugging it into the USB interface of the computer. The 3.5-inch hard disk needs a large driving bell, and an external power supply is needed in addition to the USB data cable. Although the portable requirement of mobile hard disk is not high, 2.5 inches is more suitable for the current use rhythm.
Skills of using mobile hard disk
1, don't mix power cords, because of the special phenomenon of power cords in mobile hard disk box, the interface voltage of power cords may be different. If you plug it in casually, it will burn the box or hard disk.
2. It is best not to have more than two partitions on the mobile hard disk, otherwise it will increase the waiting time for system retrieval and use when the mobile hard disk is started. Users who use FullSpeedUSB2.0 (formerly called USB 1. 1) transmission interface should be taboo, otherwise they will waste a lot of valuable time.
1. What interfaces does the mobile hard disk have? .
2. What are the types of mobile hard disk interfaces?
3. What is the type of mobile hard disk interface?
4. What kinds of interfaces does the mobile hard disk have? What are their characteristics? .
1. There are three kinds of mobile hard disk interfaces that can be seen in the market: USB interface.
2. The mobile hard disk with this interface generally uses the MiniUSB interface on the disk body to reduce the space occupation, and uses the standard USB interface when connecting to the computer.
3.eSATA interface.
4. This interface is an external version of SATA interface, which is superior to no bridge chip, and is equivalent to directly connecting SATA interface, so it is fast and has strong performance.
5.Firewire interface, namely IEEE 1394 interface.
6. This interface was first developed by Apple, so it can often be seen in Apple's computer products.
7. Newer products can already provide 800 megabytes of bandwidth and have good performance, but their market share is small.
What is the interface of the mobile hard disk? Characteristics of four types of interfaces.
Mobile hard disk can be divided into four types according to external interfaces: parallel interface, USB interface, IEEE 1394 interface and SATA interface. Most of their built-in interfaces are IDE interfaces, which are used together with the hard disk of IDE interfaces. These four types of interfaces have the following characteristics:
1. The hard disk box with parallel port (ATA interface) is the earliest hard disk box, which is connected to the computer through the parallel port of the computer. Its characteristics are high transmission speed and low price. The disadvantage is that it is inconvenient to install and use and requires an independent switching power supply;
2. mobile hard disk box with USB interface is the mainstream at present. Its biggest advantage is that it is simple and easy to use, and supports hot plug and release;
3.IEEE 1394 interface, also known as firewire interface (commonly known as "firewire" in Chinese), has a high data transmission rate. IEEE 1394a interface can provide 100Mbps, 200Mbps, 400Mbps and other transmission formats; IEEE 1394b can provide data transmission rate of 800mbps. IEEE 1394 was originally an interface of Apple computer, but it is relatively rare in ordinary desktop computers.
4.SATA interface adopts embedded clock signal, which has stronger error correction ability. Compared with the past, the biggest difference is that it can check transmission instructions (not just data). If errors are found, they will be corrected automatically, which greatly improves the reliability of data transmission.