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Do I have to de-fragment my ext3 and FAT32 filesystems on Linux? And if yes how?

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did my answer answer your question? – soandos Aug 17 '11 at 16:09
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Yes to FAT32, no to ext3. See here for tools that can do it.

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ext3 does fragment (All rewritable filesystems do), but ext3 is much better at avoiding high fragmentation levels than FAT32, so chances are you'll never hit a noticeable performance penalty anyway. – TuxRug Jun 12 '11 at 22:23
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@TuxRug Unless, of course, you eat up around 90%+ of your disk. But you have bigger problems at that point... – new123456 Jun 12 '11 at 22:36
@oneat, marking this as the answer would be appreciated. – soandos Aug 7 '11 at 6:16
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