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IBM zEnterprise EC12 Technical Guide by Parwez Hamid, Chen Zhu, Andre Spahni, Ewerson Palacio, Vicente Ranieri, Frank Packheiser, Fernando Nogal, Martijn Raave, Octavian Lascu, Luiz Fadel, Hua Bin Chu, Wolfgang Fries, Ivan Dobos

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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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