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When you create a file, most filesystems will store it in the first extent that is big enough to hold it. If the file grows beyond that extent however, the file will become fragmented. The fragment will again take the first extent big enough to hold the additional blocks, which may be an address that is lower than the original. Different filesystems ...


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Raymond Chen (long time Windows developer) explains the dirty bit here: One mystery that has gone unsolved for the longest time now is the dirty bit on hard drive volumes. Basically a dirty bit is just a 1 hex value located somewhere hidden on the hard drive that Microsoft has never reveal until recently. Windows will check the dirty bit to ...


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Starting with Vista also IO calls have priorities. By default the defrag runs at very low priority. You can use Processhacker, to set the IO Priority of the defrag tool to high: This improves the speed a bit.


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To defrag or not to defrag? Do you even need to defrag? While defragging strictly when needed will give a moderate performance restoration, disk fragmentation is rarely the cause of performance issues in modern computer systems - you have to have either a very full disk or a very atypical workload, as Windows, OS X, and Linux all try to avoid creating ...


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You absolutely should kill any running processes, as anything writing to the disk while a defrag is occurring can interfere with the process, and make it take longer. Obviously, a faster HDD will defrag faster (with the best choice being an SSD), but you should see decent gains just by closing all other non-system processes.


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Try rebooting machine Try chkdsk with option /f on the drive where you are experiencing this problem Try disabling thumbnail caching in Folder Options > View Check what processes are using your file system. It might be a background process / service that is slowing down your file browsing


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I have struggled with this myself. The issue is that Windows NTFS puts a hidden system file in the middle of the logical volume. It cannot be disabled or deleted despite instructions that may be found elsewhere, Windows needs this information to protect the drive contents and will instantly enable and/or recreate it as necessary. Here is how I solved the ...


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Quote from technet forum: "Hello, In Windows 7 - we turned off defrag for SSDs as you mention in your entry; but in Windows 8, we have changed the defrag tool to do a general optimization tool that handles different kinds of storage, and in the case of SSD's it will send 'trim' hints for the entire volume;" 'Microsoft employee' However, there was a BUG in ...


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atm, that's the answer: Is Disk Defragmenter disabled by default in Windows 7 Safe mode? Why is Disk Defragmenter disabled by default in Safe mode in Windows 7?



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