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Defragmentation FAT32 volumes (Users)

posted by RayeR Homepage, CZ, 06.07.2008, 23:37

> To be honest, I don't know of any huge reason why FAT32 defragging
> would be slow (memory limitations due to larger FAT in memory??).
Yes I think there are some reasons. AFAIK DOS defrag is RM app so it cannot manage much memory. I don't know about FD defrag but expect the same. FAT32 takes several megs for larger partition so you would need PM defrag to load entire FAT32 in memory. But there's also a view of reliability. Imagine that PM defrag will defrag your drive while updating FAT32 image only in RAM and you got power failure (I have UPS hehe but not everybody have). Then you lost current FAT32 and you will have only outdatet FAT32 on HDD but data will have new order. This would be completly messed up. So I think it's good reason to do it read-modify-write way but it's slower. As RM defrag has not enough RM it's forced to save FAT segments during work so potential losses wouldn't be so fatal.

BTW I personally rather defrag under windows (Norton Speedisk is much faster than standard MS defrag) for my FAT32 partitions.

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