What is an appropriate way to go productive again when the root cause for the block corruption is not known/not yet known?
Root cause analysis of corruptions usually cost more time than available to go productive again. But If the root cause was not/can not be determined or if it cannot be excluded definitly that the problem is fixed by the HW vendor, using the original Hardware without fall back is not safe, because more likely than a single, never reoccuring root cause is an ongoing problem.
