mkfile -s 100M /tmp/file1
mkfile -s 100M /tmp/file2
mkfile -s 100M /tmp/file3
mkfile -s 100M /tmp/file4

/srv/bd/file_bd -b 512 /tmp/file1 disk1
/srv/bd/file_bd -b 512 /tmp/file2 disk2
/srv/bd/file_bd -b 512 /tmp/file3 disk3
/srv/bd/file_bd -b 512 /tmp/file4 disk4