It was said in
http://marc.info/?l=openbsd-misc&m=125139976027774&w=2
that stacking RAID sets is not a good idea. I.e. this
# bioctl -ih softraid0
Volume Status Size Device
softraid0 0 Online 447G sd2 RAID0
0 Online 149G 0:0.0 noencl <wd1a>
1 Online 149G 0:1.0 noencl <wd2a>
2 Online 149G 0:2.0 noencl <wd3a>
softraid0 1 Online 190G sd3 RAID1
0 Online 190G 1:0.0 noencl <sd0a>
1 Online 190G 1:1.0 noencl <sd1a>
softraid0 2 Online 447G sd4 CRYPTO
0 Online 447G 2:0.0 noencl <sd2a>
softraid0 3 Online 190G sd5 CRYPTO
0 Online 190G 3:0.0 noencl <sd3a>
is not a good idea? Why not?
/Markus