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I'm on OS X, and I'm copying a large amount of data from one partition to another. Because of the nature of a magnetic disk, I feel this would go much faster if I can get 'cp' to use a huge buffer of a few hundred megs.

Is this easily possible at all? I'm copying several directories recursively.

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No matter what you do in between, shuffling data within solid-state memory chips, the processes of reading and writing a magnetic/mechanical disk, which requires physically moving pieces of metal, will take orders of magnitude more time, and there's no way to avoid that.

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Well I figure if the disk reads 100 megs, moves the head, and then writes should be much faster than doing this for every couple of kb's. This is very easily testable. –  Evert Feb 16 '12 at 12:35
    
Random access is just faster that sequential access –  Evert Feb 16 '12 at 12:36
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