Strategy for high availability of proxmox server?

Hi,
my current production server running Proxmox 1.9 seems to have an hard drive error. So I will have to reinstall the whole server which costs some hours of time and especially some hours of downtime of all the services.

Now I´m interested in a strategy to avoid this problem in the future. Would it help to have two proxmox servers running which share the containers? My server is a dedicated root server running at a providers site. So there are some things I cannot influence.

What will I have to do to have all the services running even if one server has a hardware failure? This scenario could also help to have seamless upgrades of the hosts operating system.

Thanks in advance
tabbi