This IBM Analytics Support Wed Doc describes possible hardware component failures on IBM PureData  System for Analytics, their effect on the system, and its criticality and consequences if multiple  components fail. This document also describes the architecture of IBM PureData System for Analytics to clarify the  relationships between components. It also provides guidance on replacement scenarios. This information  is intended to help users correctly respond to failures and open problem management records (PMR) with  an accurate level of severity. This document provides information to help you better understand what is needed to perform a part  replacement. By using this information, you can plan ahead without needing more information about  requirements from an IBM engineer. This document also helps you to identify the effect of a failure on the  system and schedule a replacement. This document does not apply to the following IBM PureData System for Analytics models: These models feature a different architecture than the architecture that is described in this document. There is a slight difference between the IBM PureData System for Analytics N1001 models and IBM  PureData System for Analytics N2001 and N3001 models. The IBM PureData System for Analytics N1001 (also known as IBM Netezza TwinFin® ) includes SAS  switches, which are not be covered in this document. SAS switches were replaced in later models by a  cable that directly connects the SPU to the disk enclosure, which is the only difference between the  systems. Assessing Hardware Failures on IBM PureData  System for Analytics N2001, N2002, and N3001 Assessing Hardware Failures on IBM PureData System for Analytics N2001, N2002, and N3001 1 Notes Overview IBM Netezza 100 (Skimmer®) models  IBM PureData System for Analytics N3001-001  GLYPH<SV610000>GLYPH<SV620000>GLYPH<SV630000>  ®