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The article compiles thirteen post‑mortem case studies of severe system outages—from AIX NTP misconfiguration and backup appliance driver issues to PowerHA node ID conflicts and hardware failures—detailing symptoms, root‑cause analysis, and practical remediation steps for each incident.
The article explains how IBM PowerHA SystemMirror 7.1 and Spectrum Virtualize/SVC HyperSwap enable active‑active, cross‑site storage architectures using Metro Mirror, detailing their history, topology, failover mechanisms, performance characteristics, volume‑group features, and operational advantages for high‑availability environments.
This article explains IBM PowerHA (formerly HACMP) for AIX, covering its architecture, heartbeat‑based failover mechanisms, topology and resource components, dual‑active HyperSwap solutions, and the role of the HMC management console in providing enterprise‑grade high availability.