Defragmentation is the process that reduces the amount of fragmentation on a hard disk drive.

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How can I tell if one defrag utility is better than another? [closed]

There's a lot of free defrag utilities (such as Smart Defrag, Auslogics Disk Defrag, JKDefrag, Defraggler, and there's alot more) But are they actually any better than the built in Windows one? And ...
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Defragment by format--copy-back

I want to do a defragment operation on my drive but I want it to be outside windows. This way, there will be no conflicts between files in-use and other issues. Is a defragment operation the same ...
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Why do big gaps remain after defragmentation in Windows XP?

I had the understanding that disk defragmentation in Windows XP reorganises your data so that files are contiguous along your hard drive. Every time I defragment my hard drive, I end up with blue ...
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1k views

Improve performance of RAID SSDs (without TRIM) with periodic disk defrag? Lack of TRIM even important?

I'm in no way experienced with setting up RAIDs or using SSDs, but I'm considering purchasing a SSD RAID setup (potentially RAID 10, but maybe RAID 0) and I've been doing a lot of research. A lot of ...
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537 views

Disk defrag scheduled task breaks on reboot

I configured the Windows 7 disk defrag utility to run on the 1st of the month at 1:00 AM. The associated task gets created in the Task Scheduler and all is well until the next time I reboot my ...
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Windows 7 inbuilt and 3rd party (de)fragmentation related queries

I have a pretty good idea of how files end up getting fragmented. That said, I just copied ~3,200 files of varying sizes (from a few KB to ~20GB) from an external USB HDD to an internal, freshly ...
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Windows XP scheduled task not running at appointed time and triggering on login

I have a scheduled defrag task on my Windows XP machine to wake up the computer and run at 3:00am every day. Then I have two other scheduled tasks, one to reboot the machine after the Defrag at ...
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Logical disk lose free space? [duplicate]

Possible Duplicate: Windows 7 - mysteriously missing free HDD space I have a logical disk (E): 250GB, all files' size is 223GB, but when I click to the disk, It show the disk used 237GB. ...
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USB Stick Not Contiguous

I have a 4Gb FAT32 usb stick that I use to boot several iso images using grub4dos. Any iso image I add turns as contiguous however there is one iso that no matter what I do it always show up as ...
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1answer
834 views

Is running daily defrag bad?

Running a RAID 0 setup and was wondering if running defrag too much would lead to a disk failure faster? Disks fail based on doing too many reads and writes? or is it based on the spinup and ...
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1answer
356 views

Does Disk Defragmenter continue if I close the window?

Using the standard Windows 7 Disk Defragmenter, does the defragmenting process continue if I close the window after star a task manually? There's no warning when I close the window, but I always ...
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Windows 7 Defrag scheduled seems did not work

I use windows 7 from the beginning, so the first time when I looked into the Windows 7 Disk Defragment program and I saw the Scheduled Defrag I supposed that it worked and I did not check if it worked ...
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Defragment - windows - better defragment free space or files?

I had read once here : Defragmenting all the fragmented files before CCleaner means that larger contiguous areas will be released for use instead of more and more, and smaller and smaller ...
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2answers
789 views

Frequently used files utility

Is there a Windows utility that would analyse which files are being most frequently used on one's machine? It should be able to store this statistics over several user sessions... It would help one's ...
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Can users besides Administrator run defrag in XP?

I know you can't do this by default, you will get somethign like "You must have administrator privileges to run this application.." or whatever, but I have tried various ways to get around this. I ...
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Should I defrag the hard drive running on a Virtual Machine?

I know that there is no point (in fact it is a bad idea) to run Defrag on an SSD. What about a virtual machine running on an SSD, should I defrag it's hard drive since it is basically accessing the ...
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1answer
269 views

Benchmarked effects of disk defragment in windows

Is there a study or something I could have a look at to find out how and to what extend disk defragment improves performance in windows? A benchmarking study to show the before and after effects ...
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335 views

How do I stop my laptop from waking up?

I never scheduled wake up for my laptop, but after scheduling Auslogics Defragmenter to run on Sundays, 6:01AM and laptop to wake up at 6:00AM in Task Scheduler, it was waking up. Auslogics ...
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How to defrag a folder to make sequential file access faster

I work with real-time video apps, and just defragged my (Win XP) system to try to improve the general performance. It did... but it appears to have destroyed the generally contiguous nature of certain ...
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228 views

In a multi-boot setup, does defragmenting from one OS affect the whole drive, or only its partition?

In other words, does defragmentation have to be done on each OS separately?
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3answers
259 views

Defragmenting a large amount of files (35GB) over night

I'm trying to defrag my HP G60-116ea laptop using Piriform Defraggler. Even their quick scan has been on 0 percent for about 30 minutes. There are 34GB of fragmented files. I'm presuming this is a ...
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1answer
4k views

Why is disk fragmentation measured as a percentage?

In Windows if I open up the Disk Defragmenter and analyse a disk the tool reports the disk fragmentation as a percentage: What does this percentage mean? Obviously if a drive is 0% fragmented then ...
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Scan Disk then Defrag, or Defrag then Scan Disk (in Windows)?

Which one should I do first in Windows 7? Scan Disk or Defragmenter?
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Unknown volume listed under Windows defragmenter

Does anyone know what "\?\Volume...." is or why it would be listed as a disk on the windows defragmenter? It is not listed on other defragmenters like defraggler. The E: and F: drives are ...
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Windows 8 Defragmenter?

It seems like Windows 8's defrag command has some new options, including: /K Perform slab consolidation on the specified volumes. Does anyone know what this means in English?
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Why does Windows Defragmenter do nearly nothing on a disk with 23% empty space?

While trying to defragment a 80 GB NTFS (4 KB cluster size) volume on Windows XP, I encountered a strange problem: the defragmentation process is very quick, but also very useless. Graphically, I ...
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1answer
627 views

What should I do with a badly fragmented disk? Defrag or copy to another drive?

I've inherited a machine with a large, badly fragmented disk drive containing lots of files. Defragging is very slow, and makes the drive seek a zillion times (you'd think enough to cause a ...
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1answer
356 views

Defrag and symbolic links in Windows 7

I recently purchased an SSD, and for a few reasons not worth going into I had to install Windows on a traditional HDD and make symbolic links so "Program Files" actually goes to my SSD. I started ...
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Is it bad to defragment a USB Flash Drive?

If I defragment my 8 GB Kingston flash drive, will it decrease its lifetime?
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Disk Defrag slowing computer down?

I asked How to speed up my computer? in another post and one answer was to run disk defrag. I have done this before and in the majority of cases (with multiple computers not just one) it seems to ...
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3answers
471 views

When is the data in the journal written to the disk?

(1) mentions that "With a journal the file is first written to the journal, punch-in, and then the journal writes the file to disk when ready. Once it has successfully written to the disk, it is ...
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4answers
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How to find out how often my Windows partition has been defragmented?

I know that Windows uses its defrag program to defragment my partition sometimes when my system goes to an idle state. Also, sometimes I used to execute defrag by myself in order to increase ...
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What Windows app can I use to defragment a FAT32 drive's directories at boot time?

What (Windows app) can I use to defragment FAT32 directories? I used to be a fan of PerfectDisk, but they've disabled the feature in their latest versions, and I have drives that I need to use both ...
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Cleaning and housekeeping Linux computer hard disk

I started using Linux recently. On windows (which I've used all my life) to keep the HD tidy there are several tools, e.g. disk cleanup and defragger. On Linux what should I do to tidy up a hard disk. ...
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Gracefully kill defrag.exe when run in command prompt

When I run defrag in command prompt is there any way to gracefully stop the process before it finishes? Does killing the task in TM cause any problems if it is in the middle of moving a file? ...
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How do you defragment the MFT on an NTFS disk?

A while ago, I nearly filled my hard drive, much more than the recommended maximum of 85% of capacity. I believe that NTFS started storing files in the space reserved for the Master File Table (MFT) ...
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what's the rate of return of defragmenting our hard disk?

I know some people who swore by Disk Defragmenting. But basically I was wondering if the result (a more responsive computer) is worth the effort (running defragmenter - in a 2GB ram environment that ...
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Why did defragmenting C drive increase my free disk space by 10 GB?

I used Defraggler to defragment free space on my 100 GB C:\ drive which was 85 GB full. After defragmentation, the drive showed only 75 GB full. How did 10 GB  of free space ...
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1answer
51 views

Reserving space for files or set where on the HDD a file should be placed

To reduce fragmentation, I'd like to either reserve space for files or manually state where files should be stored on the HDD so the files can grow without fragmentation. This is useful for my mail ...
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Disk fragmentation on Linux

Do I have to de-fragment my ext3 and FAT32 filesystems on Linux? And if yes how?
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Why do disks fragment?

As a part of regular Windows maintenance, I defragment my hard drive. But why does the hard drive fragment on NTFS and FAT* systems? Apparantly ext* does not, why is this? Should I also be ...
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Is there any way to defrag a bootable XP hdd so all the free space is at the end of the drive?

I have an old PC booting Windows XP from a 40Gb drive. It also has a 320Gb hdd and a CD r/w. The 40Gb drive is getting quite noisy, and I'd like to swap it for a quieter 12Gb drive I have lying ...
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1answer
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Does anyone know if it's 'normal' that you can't defrag an Outlook .ost file?

I've tried defragmenting my hard disk to see if Outlook performance improves. The .ost file shows 1000+ fragments but even after a post-defragmentation restart - never launching Outlook - it still ...
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Defrag C: /b really works to Windows boot optimization?

The command Defrag %SystemDrive% /b really works to optimize Windows boot time? (The defrag /b option is not documented by Microsoft). I am trying to use it in an attempt to optimize the files on the ...
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2answers
440 views

Requirements when defragmenting an external hard drive

I want to defragment my external hard drive which is 500 GB in size. It's divided into two partitions of 232 GB each. One has 70.5 GB free, and the other has 42.5 GB free. Can I defragment it now or ...
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2answers
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What block allocation algorithm does NTFS use?

On Windows XP 64, I downloaded a 1.2 GB file and it ended as fragmented as the image shows. Unfortunately, before taking the snapshot from Piriform Defraggler I defragmented the other files, so you ...
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Is it safe to edit files during the defragmentation process?

Assuming I'm on an NTFS partition, is it just as safe to edit files during defragmentation as when not? Is there any added risk, even if very small? If not, how does the operating system ensure the ...
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Should I defrag my drive before upgrading to windows 7 from xp?

If I am upgrading from XP to Windows 7 by doing a custom clean install, should I defrag my computer before I start the process? Or does it not even matter since everything will be wiped?
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Something chewing on my HD in Windows 7

I just experienced something strange in Windows 7. I could hear how the harddrive was used at regular intervals of about one second. The same thing seemed to steal my CPU timeslice (from my own ...
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1answer
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Win 7 defragmenter doesn't show all partitions

I just discovered yesterday that my D: partition isn't showing up in the Windows 7 defragmenter. All my other partitions (C, E, F) are there. The D: partition is running and working just fine - heck ...