Reliability, availability, and serviceability
This chapter describes the reliability, availability, and serviceability (RAS) features of IBM z13 servers. The design goal for z13 servers is to remove all sources of planned outages.
The z13 design is focused on providing higher availability by reducing planned and unplanned outages. RAS can be accomplished with improved concurrent replace, repair, and upgrade functions for processors, memory, drawers, and I/O. RAS also extends to the nondisruptive capability for installing Licensed Internal Code ...

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