Optical storage devices offer significant advantages over other high-capacity storages devices, such as tape and microfilm, with faster access times and a hierarchical-type file organization. The storage capacity of optical discs is mainly limited by the physical dimensions of the dots. Optical storage on the system provides an economical and efficient way to store and retrieve large amounts of information at a high performance level. Capacity, performance and price of optical storage devices are continually improving. If you were to use non-rounded numbers, here’s how it fares out with the prices listed above: HARD DRIVE: $0.039995 per GB OPTICAL: $0.0404042553191489 per GB CDs can store up to 700 megabytes (MB) of data, and DVDs can store up to 8.4 GB of data. The companies have cranked up the storage capacity on optical media to a stunning 3.3TB. Optical media can have a shelf life greater than 50 years. The companies have cranked up the storage capacity on optical media to a stunning 3.3TB. The storage market is projected to grow to $100 billion by 2005, according to Jim Rothnie, senior vice president, product management, at EMC (Hopkinton, MA). The optical disk is physical storage than magnetic disks and can not be damaged easily. This leaves the data in the middle of the disc, which is necessary for DVDs to achieve their storage capacity. We can obtain transparent fluorescent tape by means of the simple dip method. In multi layer discs, semi reflective instead of reflective coatings are used for all layers except the last layer, which is the deepest one and uses a traditional reflective coating. Optical storage devices offer advantages over other high-capacity storage such as microfilm and tape in that they have faster access times. Optical discs like Blu-ray are losing favor, but Sony and Panasonic don't seem to care. Optical discs like Blu-ray are losing favor, but Sony and Panasonic don’t seem to care. Advantages of optical disk compare to magnetic disk: The storage capacity of the optical disk is more than a magnetic disk. Disadvantages of the optical disk: The main disadvantages have cost both for the drive and the disks. Scientists from RMIT University in Australia and Wuhan Institute of Technology in China have developed a radical new high-capacity optical disc called “nano-optical long-data memory” that they say can record and store 10 TB (terabytes, or trillions of bytes) of data per disc securely for more than 600 years. Blu-ray discs, which are the newest type of optical media, can store up to 50 GB of data. 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