When the server has a failure, it may create a main storage dump. A main storage dump copies the contents of the server's memory to disk. It is an important tool for problem analysis. On a server with logical partitions, there are two types of failures that may cause main storage dumps: server failure and secondary partition failure.
When your server performs a main storage dump, contact your customer support representative.
Failures in the primary partition caused by server processing hardware or main storage hardware will cause the entire server to fail. Software failures in a secondary partition will cause only that logical partition to fail.
A server failure may cause a server main storage dump. A secondary partition failure may cause a main storage dump only on that logical partition.