Disk I/O as a bottleneck?

[is123 at zahav.net.il]

On Sun, 08 May 2011 10:15:30 +0300
Nadav Har'El <nyh at math.technion.ac.il> wrote:

> On Sun, May 08, 2011, Nadav Har'El wrote about "Re: Disk I/O as a
> bottleneck?":
> > Having two hard disks will, at best case, *double* your seek time. This
> > is
> 
> Of course, I meant *half*, not *double* :-)

Actually it might do a lot better than that because of caching. Aside from
the fact striped data is spread across drives, it exploits caching better
since data from more than one MRU file is likely to be in cache.