ocr: o - 3 aose. R R0 DEURIIM 5.25970h MOE - senral dh HEetis Laci MORM a - Figure L.The data storage. model consists of three evels: online storage for data you need quickly and frequently, nearline storage: for data that's refer- enced occasionally,and offline storage forcreating historical data: records. Optical storage technolo- gies fit best in the nearline and offiine levels.