Optical Storage Devices

ALSO CALLED: WORM Drives, Optical Disk Libraries, Jukeboxes, Write-Once-Read-Many Devices, Optical Storage, Optical Jukeboxes, Write-Once-Read-Many Drives, WORM Devices
DEFINITION: Blu-ray is an optical disc format designed to display high definition video and store large amounts of data.Blu-ray is the successor to DVD. The standard was developed collaboratively by Hitachi, LG, Matsushita (Panasonic), Pioneer, Philips, Samsung, Sharp, Sony, and Thomson. It became the default optical disk standard for HD content and optical data storage after winning a format war with HD-DVD,  … 
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OPTICAL STORAGE DEVICES DEFINITION (continued): …  the format promoted by Toshiba and NEC.The format's name comes from the fact that a blue laser reads from and writes to the disc rather than the red laser of DVD players. The blue laser has a 405 nanometer (nm) wavelength that can focus more tightly than the red lasers used for writable DVD. As a consequence, a Blu-ray disc can store much more data in the same 12 centimeter space. Like the rewritable DVD formats, Blu-ray uses phase change technology to enable repeated writing to the disc.Blu-ray's standard storage capacity is enough to store a continuous backup copy of most people's hard drives … 
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