Is there a difference in performance between 8MB and 16MB caches for desktop hard drives?

There is definitely a difference in read and write speed, but it's not big, and you probably don't usually feel it, unless you're going to copy a few gigabytes of files, which is still a bit different in time. In fact, the gap is not very large, if you are not very short of money, it is recommended to buy 16m, after all, it is the mainstream, spend a little money to buy a peace of mind. My computer's hard drive is 8M cache, I don't think it's too slow, it's enough to use.

Now there are still 32M cached hard drives, which is theoretically fast enough. In fact, you don't have to blindly be the strongest and high-end, just enough, and what you spend money on is just the so-called software test data.

Maybe it doesn't make any difference if you do some small operations on the Internet, but when you do a large 3D design, it will be a big feeling.

The CPU reads the data from the hard disk to the memory first. And the hard disk to memory means that the hard disk first goes to the cache and then to the memory. To use an inappropriate analogy:

You need to open a 9m file, and the memory will read twice from your 8m cache, once 8m and 1m, and 16m needs to be used once, of course, this is not the case, that is, to use this as an analogy. The parameters for purchasing a hard drive are capacity, rotational speed and this cache.

The difference is between the storage speed and the read and write speed.

The read and write speed of 16M cache is twice that of 8M.

Theoretically, the higher the cache, the faster the speed, which is basically invisible to the home.

The 16m one is faster than the 8m one, it's as simple as that.

HDD. The differences between 256MB cache and 64MB cache are: different read and write speeds, different service life, and different hit ratios for extracting data.

1. The read and write speeds are different.

MB Cache: A 256MB cached HDD has a faster read and write speed than a 64MB cached HDD.

MB Cache: A 64MB cached HDD has a slower read and write speed than a 256MB cached HDD.

Second, the service life is different.

MB Cache: A mechanical hard drive with a 256MB cache will last longer than a mechanical hard drive with a 64MB cache.

MB Cache: A mechanical hard drive with a 64MB cache will have a shorter lifespan than a mechanical hard drive with a 256MB cache.

Third, the hit rate of the extracted data is different.

MB Cache: A 256MB cached HDD has a smaller hit rate for extracting data than a 64MB cached HDD.

MB Cache: A 64MB cached HDD has a higher hit rate for extracting data than a 256MB cached HDD.

Literally, the larger the cache, the better, in fact, the size of the cache is directly related to the speed of the hard disk, the maximum write speed of the mechanical hard disk is currently kept within 220MB s, the sustained read and write speed is within 170MB seconds, and the hard disk uses 64MB DDR2 cache to transmit data to the north-south bridge chip and memory. If the hard disk uses a larger cache, the performance will not improve, but the hit rate of the hard disk to extract data will be reduced.

Due to the large cache, the hit rate of the hard disk extracting data is reduced, and the hard disk read speed is prone to ups and downs, which is also one of the reasons for the "speed drop".

The difference is not big, but there is a difference.

1. Hard disk access exchanges data between hard disk and memory, if the cache is large, the data transmission speed is improved, in general, the larger the cache, the better, and the data is more obvious in the copying process.

2. However, the larger the cache, the better, the cache of the mechanical hard disk is to work when the request is written.

3. The data will be written to the cache of the hard disk first, and when the cache is full, the data will be written from the cache to the hard disk for storage, and this operation will be repeated.

4. If you write 1G data, there is almost no difference between the speed of 64M and 128M, and if you write 120M data, the hard disk speed of 128M cache will be faster.

5. If there is a sudden power failure, just after copying things, the possibility of losing data from the 128M hard disk with large cache is much greater, because the cached data has not been completely written to the hard disk.