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IBM zEnterprise 196 Technical Guide by Chen Zhu, Esra Ufacik, Karl-Erik Stenfors, Vicente Ranieri Jr., Frank Packeiser, Fernando Nogal, Octavian Lascu, Parwez Hamid, Erik Bakker, Bill White

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RAS
This chapter describes a few of the reliability, availability, and serviceability (RAS) features of the zEnterprise System.
The z196 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 downloading Licensed Internal Code (LIC) ...

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