Software RAID on a single partition?

[Jonathan Melhuish <lists@netacclaim.co.uk>]

Say I've got the following files:

*  Some small files that I want to keep safe, eg. document backups, 
databases, etc.
*  Some big files that I don't care much about losing but need to read 
quickly, eg. video

Can I use software RAID-1 (mirroring) on a partition containing the 
first type of files and RAID-0 (striping) on the other partition?

The Software-RAID-HOWTO kind-of implies that you can do this by 
specifying a partition number in the |/etc/raidtab file, but the 
description refers to "devices" throughout, not "partitions".|

Cheers,

Jon