Is it good for the hard drive to max the disk cache and why

There are benefits, ** things need to read and write the disk frequently, the larger the disk slow, the number of reads and writes will be reduced, but the disk slowdown is larger, you need to sacrifice the amount of memory used, that is to say, the disk slowdown is to write the data to the hard disk after the size you specify, so you don't need to read and write down the hard disk for a while.

If you have a large enough memory, make the disk size up so that you can make full use of the memory and protect the hard drive. Complete.

I have 512 RAM, is that okay?

RPM is more important than cache.

Large files and random small files are all high-speed performance improvements, and continuous small files are the test cache. Therefore, in terms of daily use options, the hard disk with high rotation speed is preferred, and the hard disk with large cache is also selected at the same rotational speed.

The performance of the hard disk is determined by three parameters: speed, single disk capacity, and cache capacity. The interface bandwidth basically does not affect the performance of the current hard disk, because even the smallest bandwidth far exceeds the hard disk transfer rate, so it will not become a bottleneck that affects the performance of the hard disk. Rotational speed:

At present, ordinary hard disks are 7200 rpm (except for 5400 rpm energy-saving hard disks such as green disks), so the difference lies in the other two parameters.

The faster the speed of the hard drive.

The faster the hard drive can find files, the faster the transfer speed of the relative hard disk will be. The speed of the hard disk is expressed in the number of revolutions per minute, and the unit is expressed as rpm, which is the abbreviation of revolutions per minute. The higher the rpm value, the faster the internal transfer rate, the shorter the access time, and the better the overall performance of the drive.

The spindle motor of the hard disk drives the platter to rotate at high speed, creating a buoyant force that causes the head to float above the platter. The faster the rotation speed to bring the sector to which the data is to be accessed under the head, the shorter the waiting time. Therefore, the rotational speed determines the speed of the hard disk to a large extent.

The performance settings of the computer hard disk are optimized, and the cache acceleration effect is compared.

It's all important, and the cache performance is more obvious.

In general, to hard disk simple computer affects.

System HDD Seagate 5400 to 40G HDD.

The current machine is the same as the optical disc system, and the other configuration is E2180 memory, 2G hard disk, and Yituo 80SATA hard disk speed, which reads and writes data, and there is no difference at all.

In HDD, cache is the process of reading and writing data to the HDD, and some data is reused. In order to speed up the reading speed of the hard disk, the system will follow a certain algorithm to save the data that may be used in the cache of the hard disk, so that the next time the data is read, it can be read directly from the cache without having to read the disk. The speed of caching is much higher than that of disk, which can save a lot of time.

Similarly, data is written to the cache first. It can be seen that the cache is limited, and most of the time is the hard disk to read the information on the track. Therefore, the most critical problem to improve the performance of the hard disk is the speed of the hard disk.

Now the mainstream is 5400 rpm, and the faster is 7200 rpm. If it's an SSD, you don't have to worry about caching, and the read itself is very fast.

Not good. Due to the limitations of caching mechanisms and algorithms, if the hard disk uses a cache with a larger capacity, the performance will not be improved, but may reduce the hit rate of the hard disk reading data, resulting in an unstable read speed of the hard disk.

In addition, the speed of exchanging data between high and low speeds is not so obvious when the cache capacity is large.

In addition, large-capacity caching will also bring security risks, in the event of a sudden power failure, a large amount of data in the cache cannot be fully written to the hard disk, resulting in partial data loss.

Hard disk caching can not only speed up the read and write speed of the hard disk, but also protect the hard disk to a certain extent.

When a large amount of fragmented data needs to be exchanged, the cache can act as a temporary storage, reducing hard drive seek and mechanical wear, thereby reducing noise and extending the life of the hard drive.

Disk cache, also known as disk cache, is actually to save the data in the memory space allocated by the system for the software (this memory space is called the "memory pool"), and when the data saved to the memory pool reaches a certain level, the data will be saved to the hard disk. So is it better to have a bigger or smaller hard disk cache?

1. The larger the hard disk cache, the better.

2. Hard disk cache, in fact, is to save the data to the hard disk in the memory space allocated by the system for the software, when the data saved to this memory reaches a certain level (this is the size of your hard disk cache, the larger the cache can save more data at a time.) This data is then saved to the hard disk, which reduces the number of actual operations on the hard disk. Effectively protect the hard drive from damage caused by repetitive read and write operations.

3. The function of the hard disk cache: write buffer: when we write data to the hard disk, we do not write it directly to the hard disk, but write it to the hard disk cache first, wait for the hard disk to be free, and then write the data to the hard disk completely.

The benefit of this is to improve the response speed of the hard drive, reduce the seek time of the hard drive, and extend the life of the hard drive.

4. Pre-read: If the hard disk is idle, the last read data will be read into the hard disk cache in advance, when the system reads this data, it can respond quickly and reduce the seek time.

5. Read buffer: Whether it is reading data or writing data, keep a copy of the data in the hard disk cache, and delete the earliest copy until the hard disk cache is full. The advantage of this is that the application tends to read and write to a file frequently, so that the read and write can be done in the cache without having to access the hard disk, which greatly improves the speed.

The above is an introduction to whether a larger or smaller hard disk cache is better.

1. This is not the case, the quality of the hard disk is mainly in the bus, cache, cache speed, and speed. But the rotational speed does not affect anything, it is not decisive, it is only a matter of calorific value. The best bus at the moment is Solo 8Gb s.

2. It's just a server hard drive. However, the cost is not affordable for the average family. The larger the cache capacity, the greater the throughput when writing or reading, but it should be noted that the IO speed must be fast to achieve a large throughput, that is, the two support each other and affect each other.

RPM is nothing in a regular computer.

3. Because this is just a matter of heat, 7200 and 5400 are not comparable on desktop computers, because when the hard disk is used, if the two caches, buses, and ios are the same, only the full speed is different), but there is a difference on the mobile platform, the speed difference between the two, here is not to explain why, simply put, it is more complicated to receive the influence of other hardware itself, which involves microelectronics. Some merchants use what high-speed 7200 hard disk to deceive customers, only pay attention to the speed, and what is even more odious is that they use 5400 rpm to say that it is 7200, which is a desktop computer. Because the gap is not big, but the mobile platform does not dare to talk nonsense.

The size of the hard disk is only related to the storage file capacity, and it doesn't matter otherwise The faster the speed, the faster the system. Generally, the desktop 7200 notebook is 5400, and the notebook also has 7200. The larger the cache, the most noticeable it is when copying files.

The hard disk cache is a temporary storage space, which is actually equivalent to the desk, and the hard disk is the equivalent of the bookcase, and since the desk is more efficient than the bookcase, the larger the desk, of course, is better, and it is far away from the physical memory.

Of course it's great. Improve system performance. File reading is fast, hard disk capacity is large, and there are many things.

The cache of a hard disk serves three main functions:

One is pre-read. When the hard disk is controlled by the CPU instruction to start reading data, the control chip on the hard disk will control the head to read the data in the next or several clusters of the cluster being read into the cache (because the data storage on the hard disk is relatively continuous, so the read hit rate is higher), when the data in the next or several clusters need to be read, the hard disk does not need to read the data again, and directly transmits the data in the cache to the memory, because the speed of the cache is much higher than the speed of the head reading and writing, Therefore, it can achieve the purpose of significantly improving performance.

The second is to cache write actions. When the hard disk receives the instruction to write data, it does not immediately write the data to the platter, but temporarily stores it in the cache, and then sends a signal of "data has been written" to the system, at which point the system will think that the data has been written and continue to perform the following work, while the hard disk will write the data in the cache to the platter when it is idle (when it is not reading or writing). Although there is a certain improvement in the performance of writing data, it also inevitably brings security risks - if the data is still in the cache, the power suddenly goes down, then the data will be lost.

For this problem, hard disk manufacturers naturally have a solution: when the power is off, the head will use inertia to write the data in the cache to the scratching area outside the zero track, and then write the data to the destination when it is booted up next time.

The third is to temporarily store recently accessed data. Sometimes, some data needs to be accessed frequently, and the cache inside the hard disk will store some data that is read frequently in the cache, and when it is read again, it can be directly transferred from the cache. The cache is like the memory of a computer, which is responsible for the storage, storage and storage of data when the hard disk reads and writes data.

In this way, not only can the time for data reading and writing be greatly reduced, but also the efficiency of the hard disk can be improved. At the same time, the use of cache can also reduce the frequency of reads and writes of the hard disk, making the hard disk quieter and more power-efficient. With a larger hard disk cache, you'll be able to read games faster, copy files faster, and get a ...... ahead of the system startup

As for bigger, better? Actually, it's good to be suitable.