ref: a5f0bb12e3809c5f2a6ef5ba6b6d8fa0c1fc168d dir: /sys/src/cmd/aux/flashfs/mkit/
#!/bin/rc echo 0 0 0 0 0 16 16384 > fs.filectl 8.mkflashfs -n 16 -z 16384 -f fs.file