Windows 7 & SSD: defragmentation, SuperFetch, prefetch

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Περισσότερες πληροφορίες
This is a step-by-step article.



Συμπτώματα
Again and again, I read that so-called SSD disks would be safer and faster than traditional hard drives. What advantages does SSD? What should I be aware of in the configuration in Windows 7?
Αιτία
Προτεινόμενη αντιμετώπιση
You need to know about SSD hard drives

SSD stands for Solid State Disc or also Solid State Drive and refers to a still relatively young memory technology that is appropriate due to falling hardware prices as an alternative to traditional hard drives. SSD drives are offered in different versions, for example, as a pure Flash or hybrid plates, which combine traditional hard drive with a solid state memory. In many cases, SSD drives offer compared to "old" hard drives with write-read head distinct advantages:
  • SSD drives offer better speeds when accessing data, especially at system startup
  • SSD drives are quieter than ordinary hard drives
  • SSD hard drives require no cooling on the fly
  • SSD drives have no mechanical parts such as write head and are therefore more robust
  • SSD hard drives consume less power during operation

Currently you can buy SSD hard drives as internal hard drives for desktop PCs and notebooks or as external USB disk.

While you see mostly an available free slot with SATA port in desktops, notebooks are often forced to exchange the existing drive to an SSD drive. However, you must transfer your operating system and your data to the new drive or reinstall. As an alternative we offer SSD USB-stick around for data protection.

No matter which solution you choose, please bear in mind, that you experience the time advantages especially when reading the data - about when you start programs or loading large image or video files. When writing data, SSD disks are so far still not superior to conventional hard disks.

To use the advantages of SSD drives, you should include it best in Windows. This article and the other chapters of this series can help you. Please see the notes in each chapter. Some tips are only useful if you have only one SSD disk in your PC. Other tips can only run if you are using both a traditional and an SSD drive in your PC.




Disable automatic defrag for SSD drives

Usually detects Windows 7 after installation or after the SSD disk and correctly wraps. This also includes the detection that some services are disabled, which would restrict the functionality, performance and service life of the drive. First of all, you should check whether the automatic defragmentation is disabled. This is not the case, you should disable the automatic deactivation for the disc manually.

Note: If you disable automatic defragmentation, this applies to all connected drives. If you use conventional hard drives in addition to the SSD drive in your PC, you should manually start the defragmentation on a regular basis for these drives.



1. Open the Windows Explorer with the keyboard shortcut [Windows] and [E]. With the right mouse button click on the SSD drive or a different hard disk.





2. Click on properties.





3. Click on the tab Tools.





4. Click on the Defragment now button.





5. Click on the button Configure schedule.





6. Choose the Run on schedule option.





7. Then click OK. Then close the window.







Disable SuperFetch

SuperFetch and prefetch are storage management technologies in Windows that provide a fast-track access to data on traditional, slower hard drives. This really clever services provide only for unnecessary writes on SSD drives. Typically, Windows 7 automatically disables these services for your SSD disk. Otherwise disable it manually.



Note: The following instructions are for computers that have a single SSD disk, on which both the Windows system and programs and data are stored.



1. Click on the Windows icon.





2. Enter the command services.msc in the search programs and files box, and then press the [enter] button.





3. In the Services dialog box, locate the SuperFetch entry and double-click it.





4. Set the Startup type to disabled.





5. Then click OK. You must then restart the PC to access the changes.





Disable prefetch

To disable prefetch, you must take the detour via the registry (registry). Changes to the registry are recommended to be done only by experienced users.

Note: The following instructions are for computers that have a single SSD disk, on which both the Windows system and programs and data are stored.



Open the registry by entering the command regedit in the search programs and files field. In the tree under HKEY_LOCAL_MACHINE, click on the subkey SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management\PrefetchParameters. In the right pane double click on the Enable Prefetcher entry, and change the DWord value to 0for Enable Prefetcher . Click on OK, and reboot the PC.





Αναφορές
For other useful information, search for articles in the Microsoft Knowledge Base.


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Αναγνωριστικό άρθρου: 2727880 - Τελευταία αναθεώρηση: 10/31/2012 23:27:00 - Αναθεώρηση: 1.0

Windows 7 Enterprise, Windows 7 Home Basic, Windows 7 Home Premium, Windows 7 Professional, Windows 7 Starter, Windows 7 Ultimate

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