digital ocean droplet, FreeBSD update from 11.2 to 12.2p4, zpool upgrade and boot sector ?

[John Kennedy]

On Tue, Mar 02, 2021 at 07:54:53PM +0100, Kurt Jaeger wrote:
> I have one small droplet @ digitalocean, and updated the OS from
> 11.2 to 12.2p4, and also did the zpool upgrade.
> 
> Now: How do I update the boot sector for the additional zpool
> features ?
> 
> It normally says:
>   gpart bootcode -b /boot/pmbr -p /boot/gptzfsboot -i 1 da0
> 
> But I have no da0 on the digitalocean droplet ?

  As always, be careful.  For my droplet, my disk looks like this:

	# gpart show
	=>       40  104857520  vtbd0  GPT  (50G)
-->	         40        512      1  freebsd-boot  (256K)
	        552    4194304      2  freebsd-swap  (2.0G)
	    4194856  100662704      3  freebsd-zfs  (48G)

  So, BIOS (gpart bootcode Ok, vs UEFI) on partition 1.  If your setup is like
mine, you'd want to be using "vtbd0" instead of "da0".

  So, presumably:

	gpart bootcode -b /boot/pmbr -p /boot/gptzfsboot -i 1 vtbd0