Figure 1 shows the components and how critical they are to the system. Each component is described in  this document. The following acronyms are used in Figure 1: In an N200x / N3001 system, an SPU runs at 100% performance when it handles no more than 40  dataslices. Because each system has an "extra" SPU, each SPU handles fewer than 40 dataslices. In an N200x/N3001-002 system, 40 dataslices are available and only two SPUs. Therefore, each SPU  handles only 20 dataslices. When an SPU fails, the other SPU must manage 40 dataslices and the  difference is more significant. Assessing Hardware Failures on IBM PureData System for Analytics N2001, N2002, and N3001 2 Remote Power Controller/Power Distribution Unit (RPC/PDU)  Snippet Processing Unit (SPU)  Advanced Management Module (AMM)  Environmental Services Module (ESM)  Central Processing Unit (CPU)  Dual in-line Memory Module (DIMM)  Database Accelerator Card (DAC)  Network Interface Controller (NIC)  Figure 1. Hardware components and the effect of their failure to the system