With the continuous development of the display industry, a large amount of information is overwhelming, and people's demand for storage is gradually increasing, from 256 to 1G, from 500G to 1T and so on. The LCD advertising machine also followed closely. In order to display temporary media promotional videos, the topic of whether LCD advertising machines can use mobile hard disks began to spread in the industry. However, in the process of use, sometimes the advertising machine cannot recognize the mobile hard disk. Cardifu tells you that in the normal use of the mobile hard disk, the main reasons for the inability to recognize are the following 5 points:

1. The mobile hard disk is not compatible with the interface

The host cannot recognize the mobile hard disk due to the incompatibility between the mobile hard disk and the USB interface of the motherboard. However, this type of problem is mainly due to the poor compatibility of the USB-IDE data data transfer interface chip used in the mobile hard disk box. It doesn't matter.

2. Other electromagnetic interference

The mobile hard disk communicates with the LCD advertising machine using digital signals, and uses the same clock pulse to control the rhythm of data transmission. When the internal connection line of our USB interface is very long, or passes near other internal circuits with high-frequency radiation, these Pulse signals such as clock and data will be seriously interfered, so that the host cannot read normal data, and naturally the mobile hard disk cannot be recognized.

3, removable disk file system format

The compatibility of the file partition of the mobile hard disk system is also one of the reasons why the LCD advertising machine cannot recognize the hard disk. There are two main file system formats for the hard disk: one is FAT32 and the other is NTFS. Ordinary advertising machines can only recognize hard disks stored in the FAT32 file system and are not compatible with streaming files exceeding 8G.

4. The influence of ambient temperature

Like the LCD screen, the hard disk also has normal working conditions. The operating temperature of the high-end hard disk ranges from minus 20°C to 85°C.

5. Insufficient starting current or voltage

Generally, the working current of the computer host when recognizing and starting the hard disk is very large, generally more than 1A. When the current provided by the host is small, the mobile hard disk cannot be recognized if it cannot be started. When the startup current of the mobile hard disk is very large, the +5V power supply voltage in the host such as the LCD advertising machine is unstable, and when it is pulled too low, even if the current meets the requirements, but the voltage is too low, the mobile hard disk also cannot be normal. Work.