|Linux on the Road: A Guide for Laptops and Mobile Devices|
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Use the tool hdparm to set up better harddisk performance. Though I have seen laptop disk enabled with striping, I can't see a reason to do so, because in my humble opinion also known as RAID0 striping needs at least two different disks to increase performance.
See UNIX and LINUX Computing Journal: Tunable Filesystem Parameters in /proc How to increase, decrease and reconfigure filsystem behavior from within /proc.