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# create two raid1s, build a raid0 on top, then
# tear it down and get auto-assemble to rebuild it.
mdadm -CR $md1 -l1 -n2 $dev0 $dev1 --homehost=testing
mdadm -CR $md2 -l1 -n2 $dev2 $dev3 --homehost=testing
mdadm -CR $md0 -l0 -n2 $md1 $md2 --homehost=testing
mdadm -Ss
mdadm -As -c /dev/null --homehost=testing -vvv
testdev $md1 1 $mdsize1a 64
testdev $md2 1 $mdsize1a 64
testdev $md0 2 $mdsize11a 512
mdadm -Ss
mdadm --zero-superblock $dev0 $dev1 $dev2 $dev3
## Now the raid0 uses one stacked and one not
mdadm -CR $md1 -l1 -n2 $dev0 $dev1 --homehost=testing
mdadm -CR $md0 -l0 -n2 $md1 $dev2 --homehost=testing
mdadm -Ss
mdadm -As -c /dev/null --homehost=testing -vvv
testdev $md1 1 $mdsize1a 64
testdev $md0 1 $[mdsize1a+mdsize11a-1024] 512
mdadm -Ss
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