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

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In linux, how do you check if a disk is fragmented?

At boot, fsck sometimes reports the frgmentation for a disk: "5.3% non-contiguous". How can I get this information myself? Is there a specific fsck invocation?
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Defragsvc service causes high cpu load whe notebook is idle on Windows 8

When notebook is idle, defragsvc service starts to doing some weird things and causes high cpu load. This is not regular defragmentation job, since all disks (both ssd and hdd) are not fragmented. I ...
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1answer
22 views

Does cloning duplicate data fragments?

If I have a fragmented hard drive, will duplicating the drive recreate the data fragments? Or does the duplication process clean those up? Does it depend on the duplication tool?
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19 views

Defrag: Does it really improve performance? Could physical file location be equally detrimental? [duplicate]

Over time, windows just runs slower. Fragmented files are often to blame, but time after time I feel like I see evidence that defragmenting the files doesn't help. I've been running defrag on each ...
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0answers
21 views

Performance benefit of defragging laptop hard drives [duplicate]

It seems like defragging is becoming much less important now that hard drives are faster and SSD and becoming popular. I'm curious: what kind of performance improvement does defragging have on laptop ...
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2answers
313 views

How does Windows calculate the fragmentation percentage?

When running defrag -a -v C: on Windows 2008 R2, I got the following output: Windows Disk Defragmenter Copyright (c) 2006 Microsoft Corp. Analysis report for volume C: Volume size ...
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2answers
65 views

Is it safe to defrag a virtual machine on an SSD?

As part of my coursework I need to show some evidence (screen shot) of myself defragmenting a computer. Since I missed out doing it at college, I need to do it at home. This requires me to use a ...
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8answers
7k views

Why can't you defragment Solid State Drives?

I keep hearing that this is a huge no-no. Why is this? I run Ubuntu mostly so it doesn't affect me, but I was just wondering.
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1answer
69 views

Why is it bad to defragment an SSD? [duplicate]

I heard on the internet that defragmenting an SSD is quite harmful. I was wondering if it is true, and if so, why? I've already done it a few times and it didn't seems to be broken at all.
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1answer
52 views

Will fragmentation of a virtual machine's disk also cause host OS disk fragmentation?

I run a number of virtual machines using VMWare Player on top of host Windows 7 OS. Let's say I am using the VMs for everything from web browsing to actual work, file transfer, etc. for a long period. ...
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2answers
9k views

How many passes does Defrag take in Windows 10?

How many passes does Defrag.exe take in Windows 10? New laptop, and I started a while ago and it's now up to Pass 14
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1answer
264 views

Windows 10 “optimize drives” shows SSD as “hard disk drive”

I upgraded my old computer with a Samsung EVO 850. I did a clean Windows 10 installation. Installed Samsung Magic and fixed all the AHCI settings. Now I have full 6Gb/s transfer speed. However, my ...
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2answers
209 views

Do I still need to defrag my hard drive?

I've looked around and found multiple answers around the web on this. I turned off auto defrag on my Windows 7 machine because some people have told me it creates more wear and tear on the disk (using ...
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5answers
17k views

Does Windows 7 actually defragment an SSD drive if you tell it to?

Defragmenting an SSD drive is a bad idea and Windows 7 is (should be?) smart enough not to schedule defragmentation on such drives. However, I've opened up Disk Defragmenter on my system and found, ...
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0answers
32 views

Strange hard disk information after defrag

I just finished a defrag on one of my drives and I am now getting some bizarre info with regards the available space. I had half written this post titled "Why has defragging used all my disk space" ...
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1answer
47 views

Cannot defragment hard disk, error in CSC1.tmp

My computer is running absolutely fine, but when I run the disk fragmentation tool (right-click C:\, then Properies > Tools), the progressbar gets nearly to the end and then pops up an error in the ...
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2answers
1k views

Impossible to defragment and resize a partition

I'm trying to shrink the main partition on my new PC with Windows 7 64-bit preloaded from 500 GB to 100 GB. Unfortunately, some files prevent any attempt to go below 290 GB. I have already ...
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2answers
2k views

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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2answers
4k views

how to fully consolidate freespace on a defragmented HD

My scenario: my hdd is fully defragmented and must be kept defragmented free space must be fully defragmented (no small gaps) so when copying new files with iso2opl they aren't fragmented I think ...
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1answer
46 views

Special defrag options to place boot files in special order (for fastest boot)?

How can I defrag an HDD of a Windows OS in such a manner that the boot files which Windows loads are placed sequentially each one after another to get the fastest boot time? (incl. drivers etc) Which ...
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0answers
56 views

Defrag & Pre Optimize OS & Data Partition when cloning from SSD to HDD?

There are times I have had to clone an OS or Data partition from an SSD to a HDD. It results in major performance losses, obviously until I can sit and Defrag/ Optimize / Boot Optimize the ...
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3answers
249 views

Swapfile.sys cannot be disabled on Windows 10 [confirmed bug]

I want to delete the swapfile.sys from my C: partition because it prevents me from shrinking the drive. I set the Paging File option to 'No paging file' in the 'Virtual memory' window for my C ...
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8answers
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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
2k views

Windows 8 wrongly detects my Raid1 HDD as Solid state disk

I have upgraded my machine from Windows 7 to Windows 8 and then Windows 8.1 (this is the only available upgrade path to keep my files, settings AND applications). My system is setup as follows: 2 x ...
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4answers
3k views

Do I need to defragment Mac OS X?

Does windows need to be defragmented regularly? Why does MacOS not have a Defragmentation utility? Please teach a detailed person
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Is this a bug in Auslogics defragmenter?

When Auslogics defragmenter is done it shows a link to see a report: However, when I click the link the file explorer becomes active in the Firefox installation directory, with firefox.exe ...
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5answers
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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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1answer
126 views

How do I Defrag/Optimize a Windows 8.1 Volume which has no Drive Letter? Does it matter?

I have a Dell Inspiron Ultrabook running Windows 8.1 (64-bit). In File Explorer, I click on Drive C Properties -> Tools -> Optimize. There I see 4 drives listed as follows: OS (C:) -- OK (0% ...
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2answers
101 views

Disk defragging with unmovable files

I moved my hard disk from my laptop to my desktop in order to defrag it. I am using MyDefrag to defrag the disk. I was hoping that since the OS used was my desktop's and not my laptop's, the system ...
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1answer
191 views

Hard disk drive's full capacity is not recognized

I have a HDD (wdc wd30ezrx-00mmmb0 western digital 3gb, Link to HDD specifications) I purchased a while back and it had an original capacity of 3TB. Some unknown error happened to my computer which ...
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1answer
3k views

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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4answers
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How to manually move files on physical hard drive?

How can I manually move files on a physical hard disk? I want to move files which are never modified, only read, to the end of the partition, like movies or something.
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5answers
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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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62 views

Bluescreen at win7 Boot (Boot time defrag routine failure)

I had this drive set up for boot time defrag (only once). It contained a pagefile which was fragmented. Next time I restarted my PC, I got a bluescreen (dumping memory). After a few repair ...
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111 views

How to disable auto-update in Auslogics Disk Defrag?

How can I disable Auslogic Disk Defrag's auto-update functionality? My task bar is at the top of the screen and it keeps popping up to cover my system tray.
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How do I efficiently redistribute massive amounts of data spread across multiple drives with almost no space on them?

My problem is simple but severe. I have a huge amount of data (many files in many folders) on multiple drives (4 external HDD). Each drive is at least 1TB in size and the overall size of this "pool" ...
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3answers
127 views

What is the location of Defrag.exe on the Windows 7 DVD?

I can't find defrag.exe on the Windows 7 DVD in its default location, which is supposedly here: C:\Windows\System32 Knowing that you can defragment using the GUI tools from the DVD (which I don't ...
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1answer
596 views

Defragmenting using Defraggler made the fragmentation worse and increases “used space”

I decided to do a full defragmentation of my C: drive for the first time this day. The defragmenter I use is Defraggler by Piriform. When I analyzed the drive, it detected 13% fragmentation. After ...
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1answer
515 views

How long does defragging using Piriform Defraggler take? [closed]

I heard that defragging can make the computer faster. I downloaded Piriform Defraggler as they say that it's a better option than Windows' built-in defragging tool. I ran an analysis using Defraggler ...
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6answers
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Why is my hard drive still fragmented after I run defraggler?

I ran defraggler last night because and I let it run while I slept. I woke up this morning and it still told me my hard drive was 20% fragmented. So I ran it again before I left the house for a ...
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68 views

Windows NTFS partition disappeared from Disk Defragmenter

I've recently installed modded windows 8.1 version (it has some of the redundant features uninstalled to make it lighter and faster: Polish forum link (they are good!) It is running perfectly smooth ...
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1answer
3k views

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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1answer
69 views

VirtualBox and non-system disk fragmented to 41%?

I've installed VirtualBox reccently and have been playing around with installing different systems and working with them. I've created five different virutal machines: Windows 10 Technical Preview ...
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1answer
1k views

How To Defrag Windows 8 System Reserved Partition

Today I was cleaning up my computer and stuff and when I was defraging my partitions I saw that the System Reserved partition is 100% fragmented. So I tried to defrag it, but it doesn't seems to ...
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1answer
274 views

How to switch from SSD to HD in Windows 8.1?

I'm on the verge of giving up on this. I thought I would pose the question since I haven't found any answers and some other poor soul might run into a similar challenge. How do you configure Windows ...
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4answers
71k views

What does “Optimize Drives” do in Windows 8?

With Windows 8, there is an option to "optimize" a drive. This looks similar to the Defragment option of previous versions of Windows: I have an SSD and I know that SSDs shouldn't be ...
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0answers
93 views

Windows 8.1 dfrgui not seeing drive C or not starting at all

I've made a clean re-install of Windows 8.1 x64 today. I decided to check the disk defragmentation schedule. To my surprise, dfrgui.exe did not list drive C:, showing only my external hard drive ...
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1answer
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Windows 8 will not defrag or analyze system hard drive

I recently bought a new laptop that runs windows 8. It has been about a month and I wanted to clean the system up a bit to keep it running smooth. I tried to defrag the system hard disk drive but when ...
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4answers
3k views

What are “Excess Fragments” in defragmenting a hard drive?

I'm defragmenting my hard drive (XP SP3) with PerfectDisk 7.0, and it finds 816,659 excess fragments when I ask for an analysis. [update] Specifically, it shows that the 1TB disk is 14% fragmented ...
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1answer
25 views

When overwriting a file, how does this effect the filesystem NTFS?

Say a I have a secondary hard drive that has been defragged and optimized so that the data is a nice neat continuous block with no missing spaces/clusters. Like a solid brick wall. If I copy a file ...