IBM zEnterprise EC12 Technical Guide

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Reliability, availability, and serviceability

This chapter describes a few of the reliability, availability, and serviceability (RAS) features of the IBM zEnterprise EC12 (zEC12).

The zEC12 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, books, and I/O. RAS also extends to the nondisruptive capability for installing Licensed Internal Code (LIC) updates. In most cases, a capacity upgrade can ...

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