What are the main performance of hard disks, what are the main performance parameters of mechanical

The main parameters of the hard disk.

Capacity. Capacity is a measure of the size of the hard disk, for the information ** society, the larger the capacity of the natural choice hard disk, the better, but when buying, you should still fully consider your purchasing ability, if you do not have enough silver in your pocket, it is more realistic to buy a smaller one. Now the mainstream hard disk capacity on the market has reached 60G, if you install a computer just to write articles, watch movies, of course, 40G capacity is enough.

The factors that affect the capacity of the hard disk are the capacity of a single disk and the number of discs, but for users with these parameters, there is no need to care, because as long as there is enough capacity, three disks or two disks are not distinguishable for users. In terms of the capacity of the hard disk, it is worth noting that the nominal capacity of the hard disk is calculated according to 1G 1000MB, and in the self-test of the system and the computer, it is calculated according to 1G 1024MB, so there are many beginners who have a misunderstanding about their hard disk.

Single-disc capacity. This is just a reference index for dividing the grade of the hard disk, we have just said, this is just to show how high the production technology of the hard disk manufacturer is, but there is no difference for users, as long as the overall capacity of the hard disk meets the requirements. Hard disks are composed of one or several platters, so the capacity of a single disk refers to the total capacity of each platter, including the front and back, the increase of single disk capacity is the increase of the track density of the platter, the increase of track density not only means that the number of tracks of the platter is increased, but also the number of sectors on the track has been increased, so the platter rotates for a week, more sectors will be read out, so the larger the capacity of the single disk of the same speed, the faster the internal data transmission rate, in addition, the increase of the capacity of the single disk is also conducive to the shortening of the hard disk seek time。

Rotate speed. That is, the speed of the hard disk spindle motor, now ATA hard disk basically has 5400 rpm and 7200 rpm two speeds, usually 7200 rpm hard disk access data speed is faster, but it is not absolute, because in addition to the speed of the hard disk itself, non-hardware factors such as algorithms also determine the performance of the hard disk. Although it is said that the faster the speed of the hard drive, the better, but the faster the speed, the greater the heat.

Average seek time.

It refers to the time taken by the hard disk to move the read/write head on the disk to the specified track to find the corresponding target data, the shorter this time, the faster the read and write speed of the hard disk. At present, the average seek time of mainstream hard disks in the market is generally less than 7ms.

Data transfer rate.

Some people also call the data transmission rate of the hard disk burst data transfer rate, which refers to the speed at which the computer reads out the data from the cache of the hard disk and hands it over to the corresponding controller through the IDE interface, and the hard disk data transmission rate that currently adopts the DMA-66 transmission procedure is that after the latest ATA-133 transmission procedure is adopted, the transmission rate has been reached.

Upstairs, you're plagiarizing the 2001 bar, and it's ata133, then only Mito's hard disk is ATA133, Seagate's is SATA (serial port), and the current hard disks are all 7200 rpm.

Now the most important thing is to bring or not NCQ technology, and the cache should be 8M.

It is recommended to use Seagate's 160gsata with NCQ, 8M, 685 yuan.

What I wanted to say was said upstairs.

The main common parameters of mechanical hard disk are hard disk capacity, cache and speed, because most of the hard disks sold in the hardware market are SATA interface, so the interface part can be excluded from the main parameters. At the same time, the capacity of the hard disk, the cache and the rotation speed affect the data capacity of the hard disk and the overall data transfer speed performance.