If uptime is paramount, then I believe the new pricing model allows you to buy a second appliance and run it in "Hot-Standby" (Active/Passive) mode with no additional licensing costs. The Astaro appliances have no customer-replaceable parts. You can ask Astaro what the replacement time would be in your location if you purchase Premium Support.
Bob is correct, if you purchase a second ASG hardware appliance, you automatically get HA capability; the new licensing model also applies the free HA (failover) functionality to Software licenses.
Bob is correct, if you purchase a second ASG hardware appliance, you automatically get HA capability; the new licensing model also applies the free HA (failover) functionality to Software licenses.
if you check under Management -> High Availability and there is no information about licensing you can start HA(active-passive) with your home license.