ZFS root, no msdosfs partition

[Bernd Walter]

I've used the PINE64-LTS FreeBSD-12-RELEASE image, changed the u-boot
for the OrangePi PC2, copied the contents from the mmcsd0s2 partition.
Then I erased the mmcsd0s2 partition content, setup a new BSD label
with a freebsd-zfs partition in it.
The I setup ZFS, added the loader.conf variables, ...
The mmcsd0s1 partition with the loader was untouched.
My PC still lists the label:
[225]cicely7# ls /dev/msdosfs/
MSDOSBOOT
And the system is using it without problems to boot from it.
But in the OS itself it failed to mount, because the whole partition
is missing.
root at generic:/dev # zpool status -v
  pool: zroot
 state: ONLINE
  scan: none requested
config:

        NAME                       STATE     READ WRITE CKSUM
        zroot                      ONLINE       0     0     0
          diskid/DISK-6D181A92s2a  ONLINE       0     0     0

errors: No known data errors
root at generic:/dev # ls -al /dev/diskid/
total 1
dr-xr-xr-x  2 root  wheel      512 Jan  1 00:00 .
dr-xr-xr-x  9 root  wheel      512 Jan  1 00:00 ..
crw-r-----  1 root  operator  0x58 Jan  1 00:00 DISK-6D181A92
crw-r-----  1 root  operator  0x5b Jan  1 00:00 DISK-6D181A92s1
crw-r-----  1 root  operator  0x5c Jan  1 00:00 DISK-6D181A92s2
crw-r-----  1 root  operator  0x5d Jan  1 00:00 DISK-6D181A92s2a
root at generic:/dev # ls -al /dev/mmcsd*
crw-r-----  1 root  operator  0x55 Jan  1 00:00 /dev/mmcsd0

I guess it has something to do with ZFS using the diskid, because under
diskid it is still listed.
And I can even mount it:
root at generic:/dev # mount -t msdosfs /dev/diskid/DISK-6D181A92s1 /boot/msdos
It also worked fine with the original UFS rootfs.

-- 
B.Walter <bernd at bwct.de> http://www.bwct.de
Modbus/TCP Ethernet I/O Baugruppen, ARM basierte FreeBSD Rechner uvm.