[CentOS] Raid with one disk?

Is it possible to set up a single disk raid (kind of redundant to call a
single disk an array) but I've got a single SATA drive in the machine
not doing anything.  It's a 10k maxtor 74G drive, and what I really want
is just to backup two home partitions.  I can always reinstall the OS,
but the data can't be recovered that easily.  The mobo supports raid-0,1
and jbod.  Suggestions?

--
Snowman
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