How ssd works pdf
Optimize SSD: That really helps
A basic idea of SSD maintenance is: “Windows writes unnecessarily often to SSDs and thus noticeably reduces their lifespan. Targeted interventions in the operating system make the expensive SSD last longer ”. Another thought is: “SSDs get extremely slow when you fill them up completely. This is why Windows should be prevented, for example, by deactivating the swap file and the idle state, from storing a lot of data 'unnecessarily' ”. Both sounds logical, but have been mostly wrong since Windows 10 at the latest. To understand this, let's go through the typically recommended actions in detail.
SSDs last longer than you think
SSDs store data in memory cells, each of which can only be written to a few thousand times. Especially with a small and therefore tends to be very full SSD, there is great concern that this limit could be reached after a short time. Then you have to reckon with broken files and finally with the complete failure of the SSD. To prevent this, the control software of the SSD distributes the storage processes evenly to all cells.
In addition, many models offer what is known as over-provisioning. There is more storage space under the hood than officially stated. If a memory cell fails, it will no longer be used by the SSD. A cell from the "secret" reserve takes its place.
Thanks to this automatic system, SSDs are much more durable than you might think. This was shown by a detailed test in which several SSDs were permanently written with data over a period of months. The first errors that the drives were able to compensate for themselves occurred after 300 terabytes. The first SSD stopped working at 700 terabytes, and the last at 2.4 petabytes (2,400 terabytes). That means: in extreme cases, you can write 100 gigabytes a day to an SSD for more than 60 years before it is over. This is not a solid reason to use write access sparingly.
Don't be afraid of using the SSD
Of course, these figures do not give any reason to forego a backup of your data! But - contrary to what is often advised - you can leave Windows System Restore switched on and don't have to worry about the write accesses that this causes. The same applies to many other Windows functions that critical SSD users advise to disable, including
- the swap file,
- the idle state,
- the Windows Search service (which catalogs files for the search function)
- and Windows Write Cache Buffer Flushing (which can be switched off in the event of a power failure)
Windows 10 TRIMs automatically
If you delete a file stored on an SSD, the so-called TRIM command ensures that the storage space on the SSD is actually released again. Ultimately, TRIM ensures that the SSD works at full speed under as many conditions as possible. A reason to manually intervene in the TRIM configuration (as is still often recommended) no longer exists since Windows 7. Windows 7, 8.x and 10 will take care of it themselves if they find an SSD in the computer.
Windows 10 knows what to defragment
The same applies to defragmentation, which arranges the data fragments belonging to a file one behind the other on the hard disk. This speeds up the reading of large files from hard drives enormously, because the read head no longer has to jump back and forth to collect the fragments of a file as soon as you open it.
There are no moving parts in SSDs. The loss of time associated with positioning the read head is therefore eliminated. Older Windows versions still strained SSDs with superfluous defragmentation. Windows 10 automatically saves SSDs this stress, apart from a defragmentation optimized for SSDs, which also only runs once a month.
Windows 10 stops SuperFetch for SSDs
Since Windows Vista, SuperFetch has ensured that frequently required data that * could * be required in the future are loaded into the main memory on suspicion. Due to the high speed, this does not bring any significant advantages with SSDs. Nevertheless, Windows has occasionally activated SuperFetch for SSDs under Windows 7, for example. However, Microsoft has eliminated this problem under Windows 10.
Higher power consumption without additional performance
Energy saving plans allow you to combine various settings in Windows that affect the performance and power consumption of your PC. In the basic setting, Windows runs with a balanced energy consumption, which offers a good compromise between power consumption and performance. In this mode, Windows de-energizes drives when they are idle in order to save energy.
Contrary to what is often advised, the performance of SSDs cannot be improved by switching to the “maximum performance” energy saving plan, since the power - as described - is only switched off for SSDs that are not currently in use.
Do not switch off the swap file
If the RAM is running low, Windows is currently relocating less important data to the hard drive or SSD. Of course, this burdens the SSD with write access, which is why it is advisable to switch off the swap. In view of the currently low RAM prices, the question arises as to whether the swap file is still up-to-date.
But it is also a fact that many programs do not work correctly on systems without a swap file. Since the write access is not critical anyway (see above), you should not deactivate the swap file.
Make Windows faster
Create RAM disk: Instructions for Windows
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