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From: Stefan Monnier <monnier@iro.umontreal.ca>
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Subject: Re: dd - unequal speed from partition to partition,
	partition to file, file to partition
Date: Mon, 28 Mar 2011 18:29:50 -0400
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> dd - unequal speed from partition to partition, partition to file,
> file to partition

> /dev/sda1 to /dev/sda2            around 25Meg/s
> /dev/sda1 to a file_sda1          around 12Meg/s
> file_sda1 to /dev/sda1             around  5Meg/s

> Why ???

Maybe you need to update to a more recent version of Emacs?


        Stefan