![]() Please read our new rules page for more in-depth rules. ![]() Please do not submit the same issue more than once within 24 hours. Do everything you can to reduce the effort of the wonderful folks offering to help you.Īfter solving your problem, please mark it as solved by clicking 'flair' and confirming the 'solved' tag. State everything you have tried and all the guides/tutorials/sites you have followed as well as why they were unsuccessful. Try to research your issue before posting, don't be vague. The subreddit is only for support with tech issues. Please include your system specs, such as Windows/Linux/Mac version/build, model numbers, troubleshooting steps, symptoms, etc. Live Chat ~Enter Discord~ Submission Guidelines Which allows you to schedule the windows defrag utility to run on the next boot.Check out our Knowledge Base, all guides are compiled by our Trusted Techs. Some of these things (hibernation file for example, and system restore) can be disabled for the purpose of defragmenting. There are workarounds some defrag utilities have the ability to run on the next boot, before windows loads from a "command prompt" type environment. So, it is normal to have some files show up as "unmoveable " when you run a defrag from within the windows environment. ![]() And does the defrag utility run only when you launch it or do you allow it to run in the background on an NTFS system and "optimize the drive" doing mini defrags to put files which were saved in an incorrect area into a better position when it senses the hard drive is not being accessed? Do you sort by name alphabetically? By file type, OS first, Programs second, Data third? By frequency of use?Ī combination of the above? How do things get sorted. We also run into the problem of how do you sort the files ? Each defrag utility uses a different algorithm or method of calculting what goes where. There are many files which cannot be moved. System restore likewise is basically inaccessible, the swap / paging file, hibernation file etc. Some areas are "off limits" things like your antivirus do not allow other things to write to spaces they reserve or alter their files, even temp ones. But in XP with NTFS, you can generally defrag while windows and applications are running. This is why generally we were advised to run disk defrag in safe mode in older operating systems using FAT format. In FAT if a file is accessed, or saved while defragmentation is in progress, the whole process has to start over since it would be saved to the first empty space which is where defrag wants to move something.īut NTFS can just save it to the end and let defrag shuffle things around later. Now we run into the first problem most people encounter. Putting all the fragments of a given file in contiguous addresses and organizing the files in such a manner that there is as little wasted space between files on the fastest parts of the drive. So, defragmentation is the act of moving files around so that neither the files nor the drive is fragmented. Thus while the file itself is not fragmented, the drive may become fragmented when you save a file. But this means that there may be empty spaces on the drive which are more quickly accessible than where the file was saved. When you save a file in NTFS, it looks for the first contiguous space large enough to hold the entire file. When you save a file in FAT, it is saved to the first empty address and if it takes up more than one they may not be contiguous(Touching, next to each other, sequential) they could be at opposite ends of the drive, IE the file itself could be fragmented from the time it was saved. The MFT has a shadow or duplicate saved just in case the original gets damaged. Very small files are often actually saved directly to the MFT. In addition in NTFS, each file fragment contains a copy if the files MFT entry so that if it crashes the file can be placed back where it came from on reboot (no need for scandisk and lost file fragments). If you are formatted NTFS, it is a File based file system there is a Master File Table, a list of all files on the drive and which address or addresses each file occupies. There is a table of contents (The File Allocation Table) listing all available addresses and which file or fragment is saved at that location. If you are formatted FAT32 you have an address based file system. This to some extent depends on your file system format. This is a simplified overview and not precisely technically correct but aimed at allowing you to visualize and understand what is going on. ![]() First off lets get a general understanding of defrag what it does and how.
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