On 19/02/2021 22:30, Matthew D. Fuller wrote:

e.g., on one system BIOS-booting system, /boot/rewrite-bootcode.sh:

----------------------------------
#!/bin/sh -x
for i in /dev/nda0 /dev/nda1; do
        gpart bootcode -b /boot/pmbr -p /boot/gptzfsboot -i 1 ${i}
done
----------------------------------
Ah, that made me smile....

FreeBSD 12.2-STABLE stable/12-c243191-g079273384c2 GENERIC
[pete@skerry ~]$ cat /root/update_boot_blocks
#!/bin/sh
for DRIVE in ada0 ada1 ada2 ada3
do
    /sbin/gpart bootcode -b /boot/pmbr -p /boot/gptzfsboot -i 1 ${DRIVE}
done

I suspect there are many variants on this out there! :-)

-pete.
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