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I recently got a new Samsung SSD. It comes with software called "Samsung Magician".

Basically it lets you configure things with your new SSD. I'm really confused about Prefetch/Superfetch though.

This is an image of the "General overview":

enter image description here

When I click more info, it says this:

Windows stores common device drivers and applications in main memory in order to improve performance. Because SSDs have very fast access times, this feature is no longer necessary. In addition to taking up extra storage space, this feature requires frequent read/write operations, and is not recommended for use with an SSD.

However, I'm not sure if the "Deactivate" button deactivates the features that are bad or deactivates stopping them.

So, my question is should SSDs have prefetc/superfetch enabled?

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1. What OS? Win8? 7? .... –  BillR Oct 8 '13 at 15:37
[Accidentally submitted earlier] 1. Which OS? Win8? 7? .... (presumably not *nix since "Windows stores....") 2. You have multiple questions. "Should SSDS have prefetch/superfetch enabled?" (Yes, but OS may do it for you.) "For Samsung Magician, which setting deactivates the feature in Windows?" –  BillR Oct 8 '13 at 15:44
Not my day. Win8 tag. Duh. Still, multiple questions. Perhaps even: Do you even need Samsung Magician? –  BillR Oct 8 '13 at 15:51

4 Answers 4

up vote 2 down vote accepted

Windows 8 will skip SSDs, so NEVER change the start type of the Suprfetch service in Windows 8.

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No, SSD's should not have prefetch/superfetch enabled: http://support.microsoft.com/kb/2727880

Why are people downvoting this? You should not have superfetch/prefetch enabled on an SSD.

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Although the SuperFetch benefit will not be as large with SSD as with a HDD, you will still benefit by having SuperFetch on - even when using an SSD. It is also important to ensure it is on if you have both SSD and HDD (e.g. user profile, documents, Outlook archive, dozens of gigabytes of games on the spinning platter). Windows 7 mistakenly would turn off SuperFetch if the primary disk was solid state. Windows 8 got smarter about leaving SuperFetch on. And yes, SuperFetch is still useful for caching in RAM things stored on a SSD. –  Ian Boyd Feb 8 at 4:24

In Samsung Magician 4.4 Advanced OS Optimization:
"Deactivate" button deactivates Prefetch / Superfetch
"Activate" button activates Prefetch / Superfetch

So for SSD Prefetch / Superfetch should be disabled.

Here is how you can check that the Superfetch is really disabled in Windows:

  • Open Run dialog (Win + R)
  • Type services.msc + Enter to open the Services Manager
  • Scroll down to Superfetch service
  • Double-click on it to open it Properties box
  • The startup type should be Disabled
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Late models SSd drives in Win7 or 8 don't need to be fiddled with. Windows does it. Also - after talking to OCZ representative - new model SSD's nowadays don'y need anything turned off (exceprt maybe indexng)

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