How to set up the SSD cache and how to set the SSD as a cache disk

The write cache of the SSD is turned on by default, you can check it in the device manager, if it is not opened, you can put the previous tick on it, just restart the computer, pay attention to whether the achi mode and 4K are aligned, these have a great impact on the performance of the SSD.

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1. First of all, restart the computer with a fixed hard disk, and press the F2 button on the keyboard while restarting.

2. Go to the interface of the BIOS and select the boot option in the title bar.

3. Enter the boot interface, you can see the order of boot at the bottom of the interface, and find the name of the SSD.

4. Then press the F5 or F6 button to adjust the SSD option to the first position.

5. After setting, press the F10 button on the keyboard, and then pop up a small window to exit and save, click the yes option here. Finally, the computer will reboot, and if the fixed hard drive is equipped with a system, it will start from the SSD first.

The data to be processed is written to the cache in advance, thus improving the efficiency of the hard disk.

In terms of response speed, the response speed of SSDs is generally within milliseconds, which is not slower than that of a cache. Therefore, the increase in read speed of SSDs with cache is almost negligible.

Write data from memory to hard drive, which takes a long time to complete due to the slow hard drive. In order to solve the problem of slow hard disk, a small amount of memory is placed inside it, that is, the cache of the hard disk, and the data is first written to the cache.

Then at the operating system level, it will be considered that the data has been written, and the user's feeling is that it is fast. The hard disk then writes from the cache to the platter itself, a process that requires no user intervention.

SSDs must be cached. This is because operations with a cache are much faster than those without a cache.

The larger the cache, the faster the cracking speed increases.

Caching refers to the data that has just been used, and it is reused immediately or for a short period of time, and it will be very fast, basically instantaneous reading.

Depending on the working situation, a one-size-fits-all home SSD can be used without caching to avoid data loss in the event of a power outage. If it is used as a server, because of the heavy task, the SSD is generally required to have a cache.

The differences between m2 SSD cache and non-cache are as follows:

1. The running speed is different: the one with the cache is much faster than the one without the cache. The larger the cache, the faster the speed improvement. Caching means that the data that has just been used will be reused immediately or in a short period of time, which will be very fast, and it is basically an instant reading of data.

2. **Different: Generally speaking, the hard disk is faster with cache, and the hard disk with the same capacity is also different, and the hard disk with cache is more expensive than dozens of dollars, so it is conceivable that the speed should be faster.

Precautions for use:

It should be noted that SSDs have a write lifespan, which is about 3000 times on average, and 1 time is the upper limit of hard disk storage, which is equivalent to only 3000 times of writing.

To reduce the amount of data written to the SSD, do not put your computer's virtual memory on the SSD.

Having the advantage of an external cache is better performance consistencyThe disadvantage is that it is easy to lose data when the power is off, and additional power loss protection circuits and power-down protection logic are added to the firmware.

The advantage of no cache is that it is relatively easy to lose data when the power is off, and better cost control, but the disadvantage is that the 4K performance will be more ugly than that of the specifiers, and the disadvantages and performance consistency are not good enough, which is not suitable for high-load occasions, such as database servers.

There are two types of SSD caches, one is DRAM cache and the other is SLC cache.

In order to save costs and use DRAM cache as a promotional bargaining chip, some SSDs choose to only be equipped with 256MB of cache regardless of capacity, in which case they can only directly manage 256GB of flash memory space, which still has some shortcomings.

Therefore, in addition to observing whether the SSD is equipped with a DRAM cache chip, you should also check its specific capacity by the number on the surface of the chip to ensure that you are buying a high-performance product that is fully equipped with DRAM cache according to 1GB:1MB.

Currently, SLC caches are available on almost all TLC SSDs. At present, the SLC cache of most SSDs does not really use SLC particles as caches, but uses TLC to simulate SLC to improve sequential read and write speeds.