F7 software RAID docs?

[Bruno Wolff III]

> > > What are you going to be doing that makes you think raid 0 is desirable?
> > > For modern home machines with lots of memory, this probably isn't going to
> > > give you much of a speed up in typical use. It will make the chances of
> > > your file system being lost because of a hardware problem, about double.
> > > Raid 1 or 10 seem to be more useful for home users, than raid 0.
> > > 
> > 
> > No!  If the prob of failure during an interval T is pf, the prob of failure
> > for an array of 2 drives during T is 1 - (1-pf)^2.

For small values of pf 1 - (1-pf)^2 is very close to 2*pf. For small intervals
pf will be small.