Fig. 1. Structural schematic of a magnetic-optical-electric hybrid storage system

Fig. 2. Writing operation of magnetic-optical-electric hybrid storage system

Fig. 3. Schematic of mechanical structure of an ultra-large scale optical disc library

Fig. 4. Modules and their relationships of classified storage

Fig. 5. Classification flow diagram of hot data

Fig. 6. Schematic of multi-wavelength and multi-level optical storage