Reliability, availability, and serviceability
From the quality perspective, the z14 RAS design is driven by a set of high-level program reliability, availability, and serviceability (RAS) objectives. The IBM Z platform continues to drive toward Continuous Reliable Operation (CRO) at the single footprint level.
In order of priority, the key objectives are to ensure data and computational integrity, reduce or eliminate unscheduled outages, and reduce scheduled outages, planned outages, and the number of Repair Actions.
RAS can be accomplished with ...

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