Draft Document for Review February 7, 2020 3:15 pm 8464ch07_Upgrade.fm Figure 7-13 shows the front view of the TS7700 Server System Unit. Figure 7-14 shows the rear view of the TS7700 Server System Unit. Figure 7-15 shows the TS7700 Server Expansion Unit I/O drawer. Figure 7-13 TS7700 Server (3957-VEC) System Unit (front view) Figure 7-14 TS7700 Server (3957-VEC) System Unit (rear view) Figure 7-15 TS7700 Server Expansion Unit I/O drawer (rear view) TS7760 Cache Controller The TS7760 Cache Controller is a self-contained 2U enclosure that mounts in the 3952 Tape  Frame. The TS7760 Cache Controller provides dynamic disk pools-protected virtual volume  disk storage for fast retrieval of data from cache. The TS7760 Cache Controller offers the  following features: GLYPH<SM590000> Two Fibre Channel processor cards GLYPH<SM590000> CPU microprocessor Chapter 7. Hardware configurations and upgrade considerations  261