Let's say the memory is the actual issue, but it's manifested itself by data being corrupted and triggering undesired behaviour. Unfortunately, the corrupted st

Let's say the memory is the actual issue, but it's manifested itself by data being corrupted and triggering undesired behaviour. Unfortunately, the corrupted state has already been written back to persistent storage. So you swap in the backup storage module and all your problems go away. Until it happens again and corrupts _that_ too.