How to choose a mechanical hard disk?
The so-called mechanical hard disk is a more traditional hard disk: it is mainly composed of disk, magnetic head, disk spindle, control motor, head controller, data converter, interface, cache and other areas. Its structure is that the disc is mounted on a rotating shaft and each disc is parallel, and there is a magnetic head on the storage surface of each disc. The interval between the magnetic head and the disc is smaller than the diameter of the hair wire. All the heads are connected to a head controller, and the head controller performs the movement of each head.
The magnetic head can move along the radial direction of the disc, plus the high-speed rotation of the disc at several thousand revolutions per minute, the magnetic head can be positioned before the specified orientation of the disc for reading and writing data. Because the number of mechanical hard disks with high-precision equipment and a small amount of dust entering it will cause irreparable losses, common mechanical hard disks are completely sealed.
From a performance point of view, 7200 rpm is a big improvement over 5400 rpm, so the 7200 rpm hard drive is more suitable for computer enthusiasts, 3D game enthusiasts, professional graphics and audio and video processing, while the 5400 rpm hard drive is More suitable for notebook computers. It is not that the larger the speed parameter, the better. The mainstream desktop speed is 7200 rpm. In the past, many laptops had a rotation speed of 5400 rpm. However, the actual use is not much different. Of course, 7200 rpm will be slightly faster. The faster the speed, the greater the power consumption, and the heat dissipation will be much higher than the low speed.
At present, the mainstream is still about 1T-4T, the larger the capacity, the better, naturally, the more depends on the needs of personal use, how much demand to buy the largest disk. If there are no special needs, generally 2TB hard drives can basically meet the requirements of home storage.
SATA interface is the mainstream, SATA hard disk interface is divided into SATA1, 2, 3, of which the maximum transmission speed of SATA2.0 is 300M / s (3Gb / s), and the maximum transmission rate of SATA3.0 is 600M / s (6Gb / s). As far as hard disk interfaces are concerned, SATA3.0 has a higher transfer rate and is all backward compatible. We don't have to worry about SATA interface compatibility when buying again, we can choose the most mainstream and efficient SATA3 interface now. However, your motherboard does not have SATA3 and only SATA2. There is no need to change the motherboard for SATA3. If your motherboard supports SATA3, it is definitely the first choice.
Generally speaking, the hard disk cache is really bigger and better, and the life of the large cache hard disk is better. The mainstream cache size is 16-64mb. Therefore, when you choose the hard disk, you should choose the large-capacity hard disk cache first. The majority of current hard disks are 2MB caches, and only most SATA hard disks use 8MB caches. The large-capacity cache can obviously improve the performance of the hard disk, but the price is still a bit expensive at this stage, but you can also buy it according to your own financial situation.
The capacity of hard disks is increasing dramatically, and the single-disk capacity of hard disks is also worthy of attention, but this is also a problem that is easily ignored by users. The capacity of a single disc refers to the capacity of a hard disk, because there are usually several discs in a hard disk. The capacity of a single disc has a crucial effect on the size of the hard disk, and the capacity of a single disc directly determines the continuous data transmission of the hard disk. rate. With the same speed of the hard disk, a single disk with a larger capacity than a single disk with a smaller capacity can read more files in the same time, so the transfer rate of the hard disk will also be accelerated. Currently, single disks have reached 1T. The impact of single-disk capacity on speed is not small, pay attention to single-disk capacity when buying, try to buy a single-disk 1T hard drive.
Hard disks are always running at a high speed when they are working, and hard disks are very fragile. No one wants all their important data to be easily wiped out. Many brands of hard drives now provide consumers with a three-year or five-year quality guarantee. Remember one thing: never buy parallel hard drives. In addition, the data vendors in the hard disk do not provide any services, so you must always make a backup.
If you want to know more, our website has product specifications for the mechanical hard disk, you can go to ALLICDATA ELECTRONICS LIMITED to get more information