What are the parameters of the hard disk? How should I choose a hard drive?

The first is the capacity of the hard disk, this is the main factor in the purchase of hard disk, the current commonly used hard disk capacity is 500g, 1t, 2t, large capacity hard disk ** than small capacity hard disk is not much more expensive, so it is recommended to buy a slightly larger capacity hard disk.

The second is to look at the manufacturer, the larger manufacturers, the quality is stable, there is after-sales guarantee.

The rotational speed of the hard drive is also an important indicator of choosing a hard drive. The faster the drive, the higher the transfer speed and the overall performance.

The other is the interface of the hard disk, and you should choose the hard disk with the corresponding interface according to the motherboard you purchased.

Another is the cache capacity of the hard disk, the larger the cache capacity, the higher the performance, but the more expensive it will be.

The last one is the warranty period, because the hard disk is more prone to problems due to frequent reads and writes. At present, the quality warranty period of hard drives is generally 1 to 5 years.

And now it's mostly SSDs.

Introduced by professionals, you see: (below).

Hard disk performance indicators: we can simplify: just look at 2 things 1: read and write speed.

The read and write speed is: the speed at which we copy files, for example, our hard disk is 250g. It is divided into C drive and D drive, and the read and write speed is the speed at which files are copied from C drive to D drive.

The higher the read and write speed, the faster the speed. For example, the read and write speed of the hard disk is 3000M seconds, and the speed of copying files is 3G seconds. If two identical hard disks are combined into a raid0, the read and write speed will be doubled to 6 g seconds.

If 8 pieces are 12g seconds. However, raid0 can only increase the read and write speed, and will not increase the IOPS value: I use the same hard disk, after raio0, the read and write ability has increased by 1 times, but the average score of multiple times has only increased from 1200 to 1250 (it is normal for the hard disk to have a different score value each time, the hard disk score is a range, not a stable value, and the hard disk has a fluctuating capacity).

2: IOPS value.

The IOPS value is more like a score, the higher the IOPS score, the faster we can surf the Internet, play games, and load.

Is there any difference in speed between a 2000 and 1250 hard drive? When you open a web page and open my computer, it's a lot faster, but you need to feel it, you can feel that this computer is fast, but you can't say how fast, because both are very fast.

Read/write and IOPS are the two most important parameters of a hard disk.

If you don't understand it, just look at the score.

The main performance indicators of hard disk include hard disk capacity, hard disk speed, hard disk speed, interface, cache, and hard disk single disk capacity. The details are as follows:

1. The first important performance indicator is the capacity of a single disk. Since the computer hard disk is composed of one or several discs, the higher the capacity of a single disc, the higher the integration of the manufacturer's discs, and it can also reflect the high ability of the manufacturer to produce hard disks.

2. The second performance indicator is the speed of the hard disk, the higher the speed of the hard disk, the faster the reading speed.

3. The third indicator is the time it takes for the hard disk to move on the disk, read and write the head, and find the specified position. What he describes is the speed of the disk's ability to read and write data.

When the head moves to the track where the data is located, wait for the specified amount of time for the data to turn under the head. This time is called the mean latency, and the shorter the average latency, the shorter the hard drive's time to read data.

Mean access time is the time it takes for the head to reach the target track position from the starting position and to find the specified data from the target track. Similarly, the shorter the average access time, the faster the hard drive.

4. The last one is the data transfer rate. The data transfer rate refers to the speed at which a computer reads data from the cache through the hard disk interface and hands it over to the corresponding device.

Dear Hello, I am glad to answer for you, the main parameters of the hard disk include:1Capacity:

Refers to the amount of data that can be stored on a hard drive, usually in GB or TB. 2.Rotational speed:

Refers to the speed at which the hard disk rotates, expressed in revolutions per minute (rpm), usually at different speeds. 3.Caching:

The built-in cache of the hard drive is used to store frequently accessed data, measured in MB. 4.Interface Type:

The types of interfaces used to connect the hard disk to the motherboard are SATA, SAS, SCSI, etc. 5.Read and write speed:

The read and write speed of a hard disk, usually measured in mb s. 6.Bad Sector Rate:

It refers to the probability of bad sectors in the upper part of the hard disk, and the hard disk with a low bad sector rate is more reliable. 7.Mean Time Between Failures (MTBF):

Refers to the average time between hard disk failures, usually measured in hours. 8.Noise:

The operating noise of the hard drive, usually measured in decibels. 9.Power Requirements:

The power requirements of a hard drive, usually measured in watts. 10.Size:

The physical size of a hard drive is usually in inches and inches. Dear, I hope it can help you and wish you a happy life! 

Detailed explanation of the main parameters of the hard disk:

Rotational speed: The hard disk is usually calculated by revolutions per minute (rpm): this indicator represents the speed of the spindle motor (driving the disk) of the hard disk, for example, 5400 rpm means that the spindle speed in the hard disk is 5400 revolutions per minute.

At present, mainstream notebook hard drives.

The rotational speed is 5400rpm; Desktop hard drives are 7200 rpm. But with the continuous advancement of technology, laptops and desktops have 10,000 turns.

Single-disk capacity: Single-disk capacity is one of the most important parameters of a hard disk. A hard disk is a combination of multiple storage disks, and the capacity of a single disk refers to the maximum amount of data that can be stored in a single storage disk.

With the help of vertical recording technology, the capacity of a single disc has been upgraded from 80GB to 250GB or 320GB, while Samsung has launched a maximum capacity of 334GB per disk. The increase in the capacity of a single hard disk can not only increase the total capacity, but also help reduce the production cost and improve the work stability. Moreover, the larger the capacity of a single disk, the higher its internal data transfer rate.

When the capacity of a single disc increases, the seek action and travel distance of the head decreases, resulting in a reduction in the average seek time and faster access to the hard disk.

Cache: A cache is a temporary place for a hard drive to exchange data with the outside. When the hard disk reads and writes data, it fills and empties again and again through the cache, refills and empties again, just like a transit warehouse. Most hard disk caches are currently available.

It has already reached 16MB, while for large capacity products it is 32MB capacity.

Internal data transfer rate: Internal transfer rate refers to the data transfer rate between the hard disk head and the cache, which is simply the speed at which the hard disk reads data from the platter and then stores it on the cache. The internal transfer rate can clearly indicate the read and write speed of the hard disk, and its level is the decisive factor in evaluating the overall performance of a hard disk.

At present, most desktop hard drives are basically between 70-90MB s, and laptop hard drives are around 55MB s.

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Analysis: Hard drive performance metrics.

1. Spindle speed: The spindle speed of the hard disk is one of the determining factors that determine the internal data transmission rate of the hard disk, which determines the speed of the hard disk to a large extent, and is also an important symbol to distinguish the grade of the hard disk.

3. Hard disk surface temperature: This indicator indicates that the temperature generated when the hard disk is working makes the temperature of the hard disk seal rise.

5. Cache: This indicator refers to the high-speed memory inside the hard disk. At present, the cache of hard disks is generally 512KB 2MB, and SCSI hard disks are larger. When purchasing, you should try to choose a hard drive with a cache of 2MB.

7. Maximum internal data transfer rate: The name of this indicator is also called sustained transfer rate, and the unit is mb s. It refers to the maximum data transfer rate from the head to the hard disk cache, which generally depends on the platter speed of the hard disk and the platter line density (referring to the amount of data on the same track).

8. Continuous Trouble-Free Time (MTBF): This indicator refers to the maximum time from the beginning of operation of the hard disk to the failure, and the unit is hours. Generally, the MTBF of hard disks is at least 30,000 hours.

This indicator is not provided in general product advertisements or common technical feature sheets, and can be specifically checked online to the specific company that produces the hard drive** when needed.

9. External data transfer rate: This indicator is also known as burst data transfer rate, which refers to the rate at which data is read from the hard disk buffer. In advertisements or hard disk feature tables, the data interface rate is often used as a substitute in mb s.

At present, all mainstream hard disks have adopted UDMA 100 technology, and the external data transfer rate can reach 100MB s.

Personal opinion, these are only written, to buy a hard drive depends on what you do and use, according to personal needs to buy.

Generally, the capacity size and speed are usually considered, and the speed has low speed and high speed, if your machine is well configured, you have to choose Changxi high speed.