> > 
> > I heard that by using ccd (concatenated/striped disk devices), one can 
> > improve the disk I/O.  I read the manual (ccd) but it's more of dictionary of 
> 
> You have only one disk ?
> ccd improves disk I/O by spreading the load accross several disks. With
> only one disk ccd won't help at all.

Also note that if you put two disks in simple stripe - which you'd do if
you just wanted to improve I/O performance - you double the the chance
of disk failure making your data inacessible.  A simple stripe or
concatenation of n disks is less reliable than n individual disks.

David S.