What Do You Use To Defrag? and what other maintnance on drives?

i was reading in the logic manual about defrag disks. the only things i've done to my disks where run disk permisions, repair disk and also disk warrior. now is there something else that needs to be done to main hard drive, internal audio drive and external samples drive?
if i recall speaking to a mac tech years ago, he said there was no need for defrag disks.
so what should i run on my disks?
thanks

This business about the OS defragging is a red herring. The OS only defrags files under a certain size, and it doesn't try to optimize large fragmented free-space. (If you have a fast well-tuned system and you have large, fast hard drives with lots of free space, you may be lucky so far, and not notice any problems, maybe like the previous poster.) But if you ARE experiencing the symptoms of bad disk fragmentation, then the answer is STILL to defrag. Since using iDefrag monthly, I'm able to use at least 30% more audio tracks in Logic before any problems.
This also depends on your usage, if you're regularly coming close to filling a drive, then deleting tons of stuff to make space, you will have bad fragmentation, whether you've noticed it yet or not.
P.S. Even the OS's limited defrag won't work once the disk is badly fragmented because there will not be any large enough chunks of contiguous free space for it to write large files like its search index. I've often noticed some of these 'finder' files badly defraged, and spotlight searches are faster after proper defagging.

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