NanoBSD (8.1-STABLE): can not boot with boot0sio & can not change boot0cfg / active partition

[Lev Serebryakov]

Hello, Freebsd-embedded.

  I have two problems with NanoBSD built from 8.1-STABLE sources

  (1)    I    have  serial console configured for speed 115200. I have
  "BOOT_COMCONSOLE_SPEED=115200"  setting,  but  boot0sio hangs. "mbr"
  works  fine,  but  "boot0cfg"  can  not change booting slice in this
  case.

  (2)  When  I  try  to use fdisk to change booting slice ("fdisk -1 -a
  ad0")  it  complains after all questions (why, oh, why fdisk doesn't
  have "not ask anything" mode WITHOUT config file?!):

Should we write new partition table? [n] y
fdisk: Class not found
fdisk: Failed to write sector zero
hostname#

  boot0cfg can not install boot0sio too:

hostname# boot0cfg -B -b /boot/boot0sio ad0
boot0cfg: write_mbr: /dev/ad0: Operation not permitted
hostname#

 So,  I  can  not  upgrade  NanoBSD  in-place,  because I can not swap
 bootable partition :(


-- 
// Black Lion AKA Lev Serebryakov <lev at FreeBSD.org>