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

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How do I go about increasing defrag speed?

I'm running a defrag on a friend's laptop which is horribly fragmented and it is taking an age. Would killing any unnecessary running processes increase the speed of the defrag or is the bottleneck ...
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744 views

What is this mystery volume in Windows 8.1?

What is this mysterious volume listed in Optimize Drives list in Windows 8.1? I only have one hard disk, drive C:.
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2k views

Does Windows 8.1 prevent defragmentation from a SSD even in the event of running by mistake defrag on command prompt?

Hope you can me with this. I am concerned about a possible defragmentation on my SSD. I have a laptop running Windows 8.1 preinstalled and further equipped with a SSD. Windows 8.1 has detected the ...
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363 views

Disk fragmentation. Is it suppose to take up more space?

I decided to defrag my laptop for the first time after having my laptop for 1,5 years. I found this program piriform defraggler to use. it says my HDD is 13% fragmented, I clicked defrag and it says ...
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1answer
499 views

defrag command line in Windows 7

I'm trying to consolidate my system partition volume by running defrag in a command prompt in command line recovery mode. This is the command I'm trying to have executed: defrag C: /X /H /U After I ...
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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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Defragmentation - stuck at high percent, SQL and big file drives

I have a question regarding fragmentation - I am maintaining a couple of SQL and file servers. All of them store their data on D:\ (for SQL server it makes D:\ drive be actually about 10 files, all ...
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30 views

Windows will not open processes

I recently I come upon an unexplainable issue concerning my Windows 7 partition. When I woke up Thursday morning and logged into Windows, I discovered that it was acting really slow. It didn't take ...
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1answer
106 views

OS partition has 512 bytes clusters, should I convert to 4k?

I made a mistake and formatted the OS partition with 512 bytes cluster size, thinking that this will save a lot of space when storing small files (That was a long time ago, I didn't know that it will ...
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90 views

Reallocation Event Count high threshold

I've bought recently a WD black, and I've made a SMART check on it, these are the values : http://prntscr.com/3t6szr The rellocation event count worries me. The HDD works pretty neat tho. Installed ...
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1answer
56 views

Can a USB be removed with out un-mounting during de-fragmentation

I have a USB flash drive formatted to fat32 and I have a batch file to defragment it. Would there be any damage done to the flash drive or it's files if I was to unplug it from the USB port while it ...
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1answer
185 views

Best way to defragment hard drive? [closed]

I'm trying to understand how defragmenting works so I can write my own program to do it. I was considering have it iterate through the files on the hard drive and defragment them each seperately. ...
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62 views

Boot defrag before or after full defragmentation

As part of regular housekeeping I often run defraggler. I also run a boot time defrag. Is there any difference what order these should be run. I usually run boot-defrag first as I feel the normal ...
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8k views

How often should I defragment drives?

You can schedule Disk Defragmenter on Windows 7 to defragment disks daily. When it is useful?
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1answer
537 views

Where on the disk is the NTFS reserved area?

By default on a freshly installed system with plenty of free space on a disk, where are the NTFS reserved area located on the disk? What percentage of the way through the disk is it located at? ...
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1answer
833 views

Does Disk Defragmenter run if schedule is missed?

I'm reading a Microsoft book which says: Disk Defragmenter runs automatically on a schedule in Windows 7 (every Wednesday at 1 a.m.). What happens if the computer is not powered on at 1 a.m. ...
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184 views

Consolidation of Free Space on Ext4

I'm building an linux installation which then will be pushed to various devices with different means of mass storage. Therefore, I'd like to shorten the partitions lengths before creating an image to ...
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1answer
234 views

Defragging SSD once in order to shrink partition is also bad?

I need to somehow "defrag" my windows 7 partition in order to make a smaller image-backup of it, But windows disk management won't allow me to shrink the partition beyond x mb I need. Defraggler shows ...
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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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5answers
7k views

Is it bad to defrag a ssd? Or just pointless? [duplicate]

I've read on some websites that it's bad to defrag an ssd. But I'm reading on this website now and one person was like "You didnt do any harm its just not necessary to defrag it." I feel like that's ...
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2answers
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Avoiding extreme fragmentation of compressed system images on NTFS

Problem explanation I'm storing windows disk images created with wbadmin on NTFS drive, and I found compressing then with NTFS compression gives 1.5-2× space conservation, still giving full ...
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1answer
472 views

Optimisation not available on TrueCrypt drive with Windows 8.1

I have Windows 8.1 with TrueCrypt 7.1a. I have encrypted the whole of my secondary drive. The "Optimise Drives" dialog reports the media type as "unknown" and the current status reports as ...
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32 views

EXT and other filesystems

Is it true only NTFS needs to be defragmented? Are filesystems like ext4, 3 and 2 immune to fragmentation issues. Apple never seems to require a defragmentation so what makes some filesystems immune ...
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375 views

Contiguous physical allocation of a set of files in linux filesystem (ext4)

I have a set of files that I wish to be allocated contiguously in the filesystem. I will be accessing all these files sequentially in a single read one after the other and I want to optimize reading ...
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1answer
231 views

Is Defrag “invisible” in Windows 8?

After (buzzard's luck) installing Visual Studio 2013 RC a couple of days ago, and then Visual Studio 2013 RTM yesterday, I thought I should defrag, what with all that install/uninstall activity going ...
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1answer
356 views

Can you defragment your hard drive to much?

Is it possible to defrag to much, can this be potentially harmful to your hard drive? Just curious as I like to defrag my Hard disk every week or so sometimes even more often...
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1answer
640 views

Windows 7 laptop freezes after an hour

I have a laptop with Windows 7 Enterprise. If I leave alone for an hour then the laptop freezes. I have checked all the power options so that nothing kicks in (like hibernate, etc.) after an hour. I ...
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1answer
8k views

What happens if I stop defragmentation?

I'm using Disk Defragmenter to defragment a volume (almost 160 GiB in size). I thought it would stop after 100% defragmentation, but now I see there are multiple "passes" for "consolidation". The ...
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2answers
123 views

Why unused files files get fragmented? (Windows 7)

Every now and then i defrag my HDD partitions to maintain my PC, and each time i notice fragmented files that i haven't read/wrote-to in a while. For example npm-cache, i haven't used Node for ages! ...
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242 views

Why a command prompt comes out then disappear after I click defrag in search in Windows 8?

I did exactly the same in the pic: then I saw a quick command prompt come out and it did something quickly, then it is closed by itself. I installed the smart defrag 2, used it then uninstalled it, ...
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1answer
197 views

Windows defrag “Movable files and folders” = 23 on an empty drive?

I'm curious as to why a blank (as in formatted) drive would show it has Movable files and folders or even Unmovable when I run the Windows 7 defrag tool on the drive. C:\windows\system32>defrag E: ...
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5answers
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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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Should I defrag an SSD drive? [duplicate]

Can I run Windows' defrag on an SSD drive ? Well I believe the short answer is yes, I've heard that SSD drives require special and specific tailored defrag programs. Is it true and, if so, where ...
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1answer
2k views

How to defragment a large TrueCrypt volume that has barely any free space

I have a TrueCrypt 7.1a volume that is about 50 GB in size, formatted with NTFS and has close to 100 MB of free space. I have close to 300,000 files in it. When I was setting this up, I did this ...
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4answers
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Defragmentation stops and does not reduce below 52%

In one of my PC a single drive is not defragmenting. When i do it using windows defragmentation option the fragmentation does not reduce below 52%. I tried so many times and facing same problem. Then ...
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1k views

Can you defrag an encrypted file system

I just encrypted my entire hard drive with truecrypt and was wondering can I still defrag it? Or will that not work anymore or break something.
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What does the percentage in Disk Defragmenter Represent? [duplicate]

When I analyze a disk using disk defragmenter, it gives me a percentage. What does this percentage represent (number of fragmented files over total files?) I am using windows 7 64 bit.
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Hot File Clustering with multiple partitions

I'm planning a performance-oriented clean install of OS X 10.6 and I was wondering if the hot file clustering feature will exists only on the boot partition or if there will be one for each partition ...
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1answer
581 views

Windows Server 2008 defrag log?

Is there a log file for Windows (Storage) Server 2008 built in defragmenter? I can not find a log file, event ID, or anything that gives a reference to the status of the defragmenter. From the ...
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Can't shrink a data partition on a Windows 8 computer

My computer is running Windows 8 X64 Enterprise. I have two partitions, C (System) and D (Data). Both are bitlocked. I would like to shrink my D partition (in order to create a new one). Using the ...
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221 views

Why I cant' defrag my computer?

I tried to stard defrag in many way (start menu, run dialog and so on), and never would start. So I tried trough command line and what I get when I run defrag command is: Parameter is not correct ...
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161 views

Is a disk defragmentation needed in this case?

I'm running Debian 6.0.5 (squeeze) with ext3 as the filesystem. I'v read that ext3 does not require defrag, but I was recently trying out some torrent clients and they all came with the allocate disk ...
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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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1answer
1k views

O&O Defrag: How do you auto-shutdown after defragging a hard drive?

I want to do defragmentation and then auto-shutdown the computer after the defragmentation has complete. In O&O Defrag, there's a feature where you're able to execute a certain job after ...
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2answers
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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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284 views

Windows 8 defrag schedule ambiguous

Windows 8 introduced a new dialog, called "Optimize Drivers", in which they have put a "Scheduled optimization" part. We can now choose a schedule for the optimization, but it is unclear to me what ...
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2answers
812 views

Windows 7 — Should we forget defragmentation?

Under Windows 7, restore points are now basically incorporated in the Volume Shadowing Subsystem. I have heard defragmentation (including the one provided by Windows 7) has the possibility of ...
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1answer
566 views

Moving swapfile.sys when Defragmenting Windows Partition

I am trying to defrag the hard drive partition that Windows is running on so I can shrink the partition and create a second one. I have cleared off almost 400GB (which will allow space for an ideal ...
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728 views

Does copying a fragmented source result in a fragmented target?

If I'm going to copy a hard drive or create a VHD, should I defrag the source drive first or does it not matter? Fragmentation, as I understand it, is a result of non optimal writes so I'm not sure ...
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Do ext4 filesystems need to be defragmented?

Do ext4 filesystems need to be defragmented? If so, how do I defragment them? If not, could you post a simple explanation of why they do not need to be defragmented?