System states when Netezza Performance Server starts

When you boot the system, the Netezza software automatically starts. The system goes through the following states:
  1. Stopped
  2. Discovering
  3. Initializing
  4. Preonlining
  5. Resuming
  6. Online

When you power up (or reset) the hardware, each SPU loads an image from its flash memory and runs it. This image is then responsible for running diagnostic tests on the SPU, registering the SPU with the host, and downloading runtime images for the SPU CPU and the FPGA disk controller. The system downloads these images from the host through TFTP.