The European cloud and dedicated server provider Hetzner does not offer a FreeBSD rescue system anymore. Users running dedicated servers with FreeBSD may run into difficulties if anything goes wrong. But it is still possible to install FreeBSD and access its data from the rescue mode.
There are now two tutorials at Hetzner to install FreeBSD.
- Installing FreeBSD with OpenZFS via the Linux rescue system (requires an UEFI-capable server)
- Installing FreeBSD on older dedicated servers via the Linux rescue system
I personally recommend the UEFI-way, as it is quicker to setup and you can edit contents of both EFI and ZFS partitions from the Linux rescue mode.