ref: e03915a9f7d8c040c3b7f4e8de4f69f62aeefc99 dir: /sys/src/9/boot/disk.proto/
$objtype bin 9660srv cfs cwfs64x disk cryptsetup edisk fdisk prep dossrv gefs hjfs rc lib local.rc 555 sys sys ../boot/local.rc bin fstype diskparts