Re: RAID choices

	My experience (not all of it nice) is that
it is worth while to consider the specific situation.
One size does not fit all.
1) Is the rather small improvement in speed worth
        the added hassle and vulnerability of RAID 0,5
2) What failure modes are most likely.
          Individual hardware failures
	Simultaneous hardware failures
	Software/coding failures

	The approach is different for each failure
	scenario.

Anything that can not be reconstructed needs to be written
	to removable media.


I happily set up a RAID-1 system and thought I was
	protected from anything.  Coding and user errors
	simultaneously trashed both partitions. :=((

I now use what I call "slow cycle" RAID-1.  Every morning,
           the primary disk is copied (compressed) onto the
	secondary disk.  In my environment, human failures
	are much more likely than hardware failures.  This
	"slow cycle" approach also protects against the all too
	common  --- rm wrongfile  -- 
	
	Pat