What is the speed of the hard disk

Ordinary domestic hard disk speed generally has 5400rpm, 7200rpm several, high speed hard disk is now the first choice for desktop users, but for notebook users is 5400rpm, although already have a company released 7200rpm notebook hard disk, but in the market is still relatively rare; Server users to the highest performance requirements of the hard disk, the server used SCSI hard disk speed is basically 10000rpm, and even 15000rpm, the performance of more than home products.

Negative impact

The higher rotational speed can shorten the average seek time and the actual reading and writing time of the hard disk, but with the continuous improvement of the speed of the hard disk, it also brings about the negative effects such as temperature rising, motor spindle wear increasing and working noise increasing. The speed of the notebook hard drive is lower than the desktop hard drive, which is partly affected by this factor. Notebook internal space is small, notebook hard disk size (2.5 inch) is also designed than desktop hard disk (3.5 inch) small, speed increase caused by the temperature rise, the notebook itself to the thermal performance of the higher requirements; the noise becomes larger, and must take the necessary measures to reduce noise, All these have put forward more request to the notebook hard disk manufacture technology. At the same time, the increase in speed, while the other maintain the same, it means that the power of the motor will be increased, unit time to consume more electricity, battery working time shortened, so that notebook portability is affected. Therefore, notebook hard drives generally use a relatively low speed 5400rpm hard drive.

Technology

The speed is changed with the improvement of the hard drive motor, now the liquid bearing motor (FLUID dynamic bearing motors) has completely replaced the traditional ball bearing motor. The liquid bearing motor is usually applied to the precision machinery industry, it uses the mucous membrane fluid oil bearing, replaces the ball with the oil film. In this way, the direct friction of the metal surface can be avoided, the noise and temperature are minimized, and the oil film can absorb the vibration effectively, which can improve the anti-seismic ability and reduce the wear and prolong the life.