TS7720 Cache Controller
The TS7720 Cache Controller is a self-contained 2U enclosure that mounts in the 3952 Tape Frame.
The TS7720 Cache Controller provides RAID-protected virtual volume disk storage for fast retrieval of data from cache. The TS7720 Cache Controller offers the following features:
- Two Fibre Channel processor cards
- Intel† xScale 667 MHz or custom ASIC microprocessor
- Two battery backup units (one for each processor card)
- Two AC power supplies with imbedded enclosure cooling units
- 12 DDMs, each with a storage capacity of 3 TB (2.73 TiB)
- Supports Advanced Encryption Standard (AES) 128-bit encryption
- Optional attachment to a maximum of nine TS7720 Cache Drawers in a TS7720 Base Frame
- Optional expansion of cache capabilities (up to 15 additional TS7720 Cache Drawers) when a fully populated TS7720 Base Frame attaches to a fully populated TS7720 Storage Expansion Frame
Figure 1. TS7720 Cache Controller 3956-CS9 (front
view) 

Figure 2. TS7720 Cache Controller 3956-CS9 (rear
view)
