Optical Discs
Optical Discs
HDD, Compact Discs, Pendrives are used to store data, and data is all kind of digital informations that you can keep stored to open further.
An optical drive is an input device because it reads data from optical discs like CDs, DVDs, and Blu-ray discs. Its primary function is to retrieve data stored on these discs and transfer it to the computer for processing. So, in a nutshell, it's like the librarian of the computer world - fetching information when needed.
Anything from 1.46GB to 17.08, Blu-ray discs can store 25 or 50 gigabytes of data.
Optical recording equipment is used to digitally store and retrieve data on optical discs such as CDs, DVDs, and Blu-ray discs. These discs use a laser to read and write data on a reflective surface, allowing for high-capacity storage of music, videos, software, and other digital content.
CDs, DVDs and BluRay discs all work in similar ways. The primary difference is the data density on each disc. CD is the lowest density. A DVD can store several times the amount of data on the same surface area and BluRay will store several time the amount of a DVD.
Yes CD is a sequential strage device. bcoz data store in CD in the form of sequence means we can store data in CD one by on track. we cant jump on different no. of tracks to store data. if we store data in track 1 then another data can store in track 2 not directly 3 or 5.
Storage media similar to compact discs but with greater data capacity include DVDs and Blu-ray discs. DVDs can typically hold 4.7 GB for single-layer versions and up to 8.5 GB for dual-layer versions. Blu-ray discs significantly increase storage capacity, offering 25 GB for single-layer and 50 GB for dual-layer formats. Additionally, Ultra HD Blu-ray can store up to 100 GB on triple-layer discs.
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You can indeed make Blu-Ray discs that hold 35 GB of data or more.
"Ultraviolet discs" may refer to ultraviolet light-sensitive data storage optical discs used for archival backup. These discs utilize a special coating to protect the data layer from UV light degradation. To use them, you need a compatible optical disc drive that can read and write data to these discs.