How to care for laptop hard drive
Rectifier Diode A semiconductor device used to convert alternating current into direct current. The most important characteristic of a diode is its unidirectional conductivity. In the circuit, current can only flow from the positive pole of the diode and the negative pole flows out. Usually it contains a PN junction with two terminals, positive and negative. Its structure is shown in the figure. The carriers in the P region are holes, and the carriers in the N region are electrons, forming a certain barrier in the P region and the N region. When the applied voltage makes the P region positive with respect to the N region, the barrier is lowered, and the storage carriers are generated near the two sides of the barrier, which can pass a large current and have a low voltage drop (typically 0.7V), which is called positive. Wizard status. If the opposite voltage is applied, the barrier is increased to withstand a high reverse voltage, and a small reverse current (called reverse leakage current) is called a reverse blocking state. The rectifier diode has significant unidirectional conductivity. The rectifier diode can be fabricated from materials such as semiconductor germanium or silicon. The silicon rectifier diode has a high breakdown voltage, a small reverse leakage current, and good high temperature performance. Usually high-voltage and high-power rectifier diodes are made of high-purity single crystal silicon (it is easy to reverse breakdown when doping more). This device has a large junction area and can pass a large current (up to thousands of amps), but the operating frequency is not high, generally below several tens of kilohertz. Rectifier diodes are mainly used in various low-frequency half-wave rectification circuits. If full-wave rectification is required, they must be connected to a Rectifier Bridge. Rectifier Diode,Smd Diode,Smd International Rectifier,General Rectifier Dongguan Agertech Technology Co., Ltd. , https://www.agertechcomponents.com
The important equipment for keeping information resources in notebooks is that although hard disk technology is now advanced and sophisticated, the failure rate of hard disks is usually lower than other storage devices, but only the correct use and good maintenance can ensure that the hard disks can play their best. Performance can guarantee data security and hard disk life.
1, to provide your notebook with uninterrupted power, generally in a high-speed rotation, if the hard disk suddenly loses power during reading and writing, it may lead to damage to the hard disk.
2, for your laptop hard disk cooling, temperature is too high or too low will make the crystal oscillator clock frequency changes. Temperature can also cause the circuit components of the hard disk to malfunction, and magnetic media can also cause recording errors due to thermal expansion.
3. Regularly defragment the laptop's hard disk. If there is a lot of debris accumulation, when accessing a file, the hard disk may take a long time to read the file. Not only the access efficiency is reduced, but also the track may be damaged.
4, to prevent vibration, hard drive at work, in the event of a large shock, it is easy to cause the head and the data area hit, resulting in disk data area damage or scratch the disk, the file data stored in the hard disk is lost.
5, keep the computer working environment clean 6, develop the habit of correct shutdown 7, pay attention to high temperature, moisture, electromagnetic interference