It seems strange to take one of the most reliable machines ever made and have to think about Disaster Recovery.
So perhaps Cloud can bring a bit of a silver lining. Why not take an IBM Power server, place it in a Tier 3 data centre, partition up a number of LPARs and let customers back-up to it every night. Seems a logical idea and means the client has a warm standby with little to no extra cost.
The cost of a data feed each night for incremental back-up is negligible and the cost of data storage especially for ERP systems is also minimal. But in the event of a disaster the client can be back on-line with the usage of a chunk of the machine within minutes.
Smart solution, cost effective and Cloud enabled. I call it Disaster Recovery Plus.