1. Shot or Schottky noise

2. Thermal or Johnson noise

3. Partition noise.

Partition Noise, which occurs in vacuum tubes, optical fibers etc.

The word 'Noise' in communication theory is a barrier to communication that may weaken or destroy a message that is trying to be relayed There are a number of ways to classify noise. It can be subdivided according to type, source, effect, or relation to the receiver, depending on circumstances. In order to make the classification more compact, noise sources can be divided into two main groups: • Noise whose sources are external to the receiver (External Noise) and • Noise source created within the receiver itself (Internal Noise). types include: Shot noise; Johnson noise; Partition noise and White noise

The system partition(a partition where the operating system is installed) is the active partition of the Hard Drive

Must be at least a 2 GB partition. System partition.