# dual-disk interleave variant (vn2 + vn3 both reprobed concurrently)
$ vnconfig -c /dev/vn3 /root/mbr.img
$ (timeout 45 ./poc2742 /dev/vn3 /dev/vn3s1 40 &) ; timeout 45 ./poc2742 /dev/vn2 /dev/vn2s1 40
/root/r1.log:did 12717 forced reprobes over 40s with 8 concurrent readers
/root/r2.log:did 12493 forced reprobes over 40s with 8 concurrent readers
(r2 readers all stopped early with EINVAL; no panic)