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optical Drives

In English also Optical Disc Drive...
In English also Optical Disc Drive (ODD). Optical drives are used to read optical media (mass storage). A CD-ROM drive reads CDs (CD = Compact Disc) and CD- ROMs (ROM = Read Only Memory). A laser scans the CD randomly from in order to read the data stored on it. The disc rotates in the drive with a maximum of 10000 rpm. This type of drive is now obsolete and has been almost completely replaced by DVD drives and combo drives.

A DVD-ROM drive reads DVDs (digital versatile disc digital versatile disc). The DVD in this case has a much larger capacity than a CD.

A combo drive, however, combines the ability to read DVDs and CDs. However, this can only describe as CD-RW and CD-R.

To describe DVDs you need a DVD burner. This reads both DVDs and CDs and can describe both also. Small hint on the edge: DVD-R (DVD -Recordable) stands for write once, DVD-RW (DVD-Rewritable) stands for repeatedly writable, DVD-RAM (DVD-Random Access = MEMORY) is for, DVDs with free read and write access and multi-variable data; DVD-DL (DUAL lAYER DVD) represents two data layers on one side of the DVD

Then there is the Blu-ray technology, which still can store larger amounts of data and is also backward compatible with DVDs and CDs. Blu-ray burner can also write DVDs and CDs in addition to Blu-ray discs. Blu-Ray drives work with another laser technology as DVD drives. The used here, the laser beam has a wavelength of 405 nm as opposed to 650 nm with a DVD laser. This shorter wavelength allows dense to arrange the data on the disc and thus achieve a higher storage capacity.
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