Copy bootcode to mirror disk?

perikillo perikillo at
Thu Jun 23 20:19:18 UTC 2016

Hi I have a server with 2 hard disk in mirror setup.

My slices are:

root at spam:/boot # gpart show ada1
       34  976773101  ada1  GPT  (466G)
         34          6        - free -  (3.0K)
         40        128     1  freebsd-boot  (64K)
        168    2097152     2  freebsd-ufs  (1.0G)
    2097320   16777216     3  freebsd-ufs  (8.0G)
   18874536   16777216     4  freebsd-ufs  (8.0G)
   35651752    1048576     5  freebsd-ufs  (512M)
   36700328    1048576     6  freebsd-swap  (512M)
   37748904  939024231        - free -  (448G)

My mirror has ada0 ada1, ada0 var slice fails, them I decide to replace the
whole disk and follow the instructions for that using gpart and backup my
current good disk layout into my new disk.

gpart backup ada1 | gpart restore -F /dev/ada0

This create my slices, I forget each mirror slice and add each slice into
the mirror again.

Everything working, but looks like I forget to add the bootcode to my new
disk because it won't boot.

Now is booting from 2nd disk but need to boot from all hard disk, if ada1
fails I will have issues.

If some one could explain me the steps will be appreciated, thanks.

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