Library Modules
1-2 StorageTek SL8500 Library Guide
Drive and Electronics Module (DEM)
There is one DEM at the rear of the library which contains the AC power distribution
units (PDUs), load sharing DC power supplies, four accessory racks, electronics
control module, and tape drive bay with 64 slots.
Figure 1–1 Drive Expansion Module (rear view)
Figure Legend:
1. Accessory rack
2. Drive bay
3. DC power supplies
4. Ethernet switches
5. Electronics control module
6. AC PDUs