Why Windows 10, 8.1 and 8 defragment your SSD and how you can avoid this


How disk optimization works in Home windows 8+

You possibly can kind dfrgui on the Begin display to open the disk optimizer. It runs the defrag.exe utility to defragment HDDs on schedule, similar as in Home windows 7. This instrument has been rebranded in Home windows 8, as a result of there’s a brand new function now for SSDs.

Home windows 7 sends TRIM instructions to an SSD when recordsdata get deleted. Home windows 8 takes it one step additional by additionally sending TRIM instructions for all the SSD quantity when the PC turns into idle. This motion takes just some seconds.

The ScheduledDefrag job is answerable for carrying on this project. The absence of seen triggers signifies that it operates beneath the umbrella of computerized upkeep.

That is one other new Home windows 8 function primarily geared toward bettering energy effectivity and lengthening battery life in cell PCs. It bundles all upkeep duties and runs them beneath the excessive efficiency plan proper after a plugged in PC turns into idle.

The actual perpetrator is the ScheduledDefrag job, however the issue surfaces throughout computerized upkeep. Have you ever skilled it? Let’s see!

Is it good to disable Superfetch?

Most customers ought to maintain Superfetch enabled as a result of it does assist with general efficiency. When you aren’t certain, attempt turning it off. When you don’t discover any enhancements, flip it again on.


Is Microsoft conscious of the issue?

A greater query is whether or not the proper product group is conscious. It may’ve been, however… Right here’s a case in the Answers forums, however the poster is distributed away to the TechNet boards by the assist engineer. Right here’s a different case in the TechNet forums that principally dissects the issue, however it’s not given any consideration from Microsoft.

These boards threads are usually not new by any means, but the issue continues to be reproducible… I’ve raised a defect on Microsoft Join, however at the moment I’ve no indication that it’s been forwarded to the product group. I’ll maintain you posted.

Upd. (Feb 2014). I’m fairly certain that my bug report by no means reached the product staff and now I do know it by no means will.

Do you have to defrag an SSD?

You’ve doubtless heard earlier than that you must by no means defragment your SSD. Typical knowledge says not solely do strong state drives not want defragging, doing so would trigger pointless writes to the drive. That is solely partially true. In actual fact, Home windows does generally defragment SSDs—on function.

How lengthy will my SSD final?

Present estimates put the age restrict for SSDs round 10 years, although the common SSD lifespan is shorter. In actual fact, a joint research between Google and the College of Toronto examined SSDs over a multi-year interval. Throughout that research, they discovered the age of an SSD was the first determinant of when it stopped working.

Energy Loss

  1. Your pc is relocating knowledge on the exhausting drive by erasing it and rewriting it throughout a system defragmentation. If the pc loses energy throughout a defragmentation course of, it will probably depart elements of recordsdata incompletely erased or rewritten. This causes the recordsdata to be corrupted and so they might not be recoverable. If the corrupted file belongs to a program, this program could stop working altogether, which generally is a big downside if it belongs to your working system. If an working system file is corrupted, there's an opportunity that you simply'll need to reinstall the working system to have the ability to use the pc once more.


Defragmentation is nothing greater than arranging all of the pages/sectors collectively so as in order that they’re shut to one another. In a wonderfully defragmented disk, the sectors of every file can be in an orderly sequence one proper after the opposite, similar to the pages in a ebook.

Now, unjust like the pages of a ebook strewn about your own home, disk sectors are a bit extra restricted in how they are often laid out. To ensure that the sectors of 1 file to be organized so as, different recordsdata or fragments of recordsdata could need to be moved out of the best way to make room.

In actual fact, that’s what a defragmenting instrument spends most of its time doing: shifting recordsdata round on the disk to make room so different recordsdata could be specified by order.

It’s additionally one of many issues that differentiates one disk defragmenting instrument from one other: some are merely higher or extra environment friendly at shifting issues round as little as doable, in order to be accomplished as rapidly as doable with a consequence that’s as acceptable as doable.

However do I have to defrag?

Most likely not.

Up to now, the reply was a reasonably clear “sure”, however issues have modified.

  1. Stable State Drives (SSDs) shouldn’t be defragmented. The delays defragmenting seeks to scale back need to do with the hard disk’s learn/write head bodily spinning over magnetic materials. Motion takes time. In SSDs, there isn’t any motion, so there’s no sensible benefit to sectors being logically adjoining. Stable state memory wears out the extra you write to it, and never solely does defragmenting write to the disk so much, however the applied sciences utilized in flash-based drives to unfold the damage and tear over all the system additionally usually conceal the precise bodily location — so sectors that may look like adjoining really are usually not.3
  2. Home windows  variations 7 and later do it for you. There’s an mechanically scheduled weekly job to defragment your exhausting disks. As soon as per week is simply effective, and also you want do nothing extra.

So if both of these issues are true — you’ve SSDs otherwise you run Home windows 7 or later — you want do nothing.

If, nonetheless, you’re working one thing sooner than Home windows 7 otherwise you suspect that the once-a-week schedule may not be sufficient, and you’ve a standard exhausting drive, then handbook defragmenting is likely to be value a shot.

What does optimize drives imply?

Disk Defragmenter helps to enhance efficiency by optimizing your exhausting drive. It really works by making knowledge wanted by the working system quicker to search out.

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