http://ubuntuforums.org/showthread.php?t=793688&page=15

I found that using the "noop" I/O scheduler as well as doing "sync" to
flush out file system buffers helped speed up performance.

You can do it on-the-fly w/o rebooting using the a command like:
echo 'noop' > /sys/block/sdb/queue/scheduler

OR

you can set it in your boot grub boot menu as a kernel option:
=======================================
I found that by appending the string elevator=as to the end of the kernel 
parameters in /boot/grub/menu.lst, you can enable anticipatory I/O scheduling. 
The strings elevator=deadline and elevator=noop can be used as well, though I'm 
not so sure about their effects.
Code:

title        Linux Mint 7 Gloria, kernel 2.6.28-15-generic
root        (hd0,7)
 kernel        /vmlinuz-2.6.28-15-generic root=/dev/sda6 ro quiet splash 
elevator=as
initrd        /initrd.img-2.6.28-15-generic
quiet

=======================================

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https://bugs.launchpad.net/bugs/541937

Title:
  Copying files to USB flash drive is extremely slow

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