FG

What block allocation algorithm does NTFS use?

Fresh3 days ago
Mar 15, 20263651 views
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Problem

On Windows XP 64, I downloaded a 1.2 GB file and it ended up fragmented, as the image shows. Unfortunately, before taking the snapshot from Piriform Defraggler I defragmented the other files, so you can't see the exact state at the point the file was written. However, the disk was all the time abou…

Error Output

SetEndOfFile

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Fix for: What block allocation algorithm does NTFS use?

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IIRC, the NTFS filesystem attempts to allocate the file in contiguous storage. However it can only do that if the filesystem knows the size of the file. If you open a file and start writing to it, it'll write to the "best" place to fit the file (typ…

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