Re: Port a machine from arm64 to amd64

Thank you very much for all your replies!

I never took a look at sysmerge. I never used it before, because when upgrading to a new OpenBSD version I always took the path that Peter suggested.
This time however, because im am only switching architectures and not versions, I figured there should be an easier way. I had hoped for a tool that would simply replace all arm64 binaries with the corresponding amd64 ones.
Nevertheless, sysmerge looks quite promising, at least by identifying the files that I will have to take care of.

-Heinrich

> On 26. Feb 2026, at 22:14, Kirill A. Korinsky <kirill@korins.ky> wrote:
>
> On Thu, 26 Feb 2026 17:35:58 +0100,
> Heinrich Rebehn <Heinrich.Rebehn@rebehn.net> wrote:
>>
>> Hello All,
>>
>> I have a mailserver that runs OpenBSD 7.8 arm64. I want to transfer this installation to a amd64 machine. Do you know of an easy way other than manually copying the config files to a blank amd64 installation?
>> Maybe automatically select all architecture-independent files and use them to overwrite the corresponding files on the amd machine?
>>
>
> I think you're looking for sysmerge options -d and -p.
>
> If I understand correctly that you try to achive, when I'll do somethign
> like that:
>
> 1. pkg_info -mz -- to get list of installed packages
> 2. sysmerge -d -- to get changes in system's config files
> 3. sysmerge -d -p -- to get changes in port's config files
>
> with all of this in new machine:
>
> 1. pkg_add $(cat list-with-packages)
> 2. apply diff from previous (2)
> 3. apply diff from previous (3)
>
>
> --
> wbr, Kirill