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# Assessing Hardware Failures on IBM PureData System for Analytics N2001, N2002, and N3001 

## Overview 

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. 

## Notes 

This document does not apply to the following IBM PureData System for Analytics models: 

IBM Netezza 100 (Skimmer®) models  

IBM PureData System for Analytics N3001-001  

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. 

