Read the Gibson paper in its entirety.

From the Anderson paper, focus on Section 1 (Introduction) and
Sections 3.1 (Metadata and Data Distribution), and 3.1.1-3.1.3.
Think about answers to the following questions:

- How does xFS achieve better scalability than traditional network
  file systems?

- What are the technological factors that enable the xFS approach?

- Describe the use of the Manager Map, Imap, Index Node, Index
  Number, and File Directory xFS structures.

- What is the procedure to read a block in xFS? (Figure 3)