RAIDframe hot spares

[Edgar Fuß <ef%math.uni-bonn.de@localhost>]

I have another question on RAIDframe, this time on hot spares (which I never 
used before).
I was at A and B "optimal" and C "spare", and B failed. I would have expected 
RAIDframe to immediately start a reconstruction on C, but that didn't happen; 
I had to raidctl -F B first.

In case it matters, that setup was reached through the following events:
A and B "optimal"
B failed
A "optimal", B "failed"
raidctl -a C
A "optimal", B "failed", C "spare"
raidctl -F B
A "optimal", B "spared", C "used_spare"
raidctl -B
A and B "optimal", C "spare"

Isn't the point of a *hot* spare to immediately reconstruct on it if neccessary?