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Instead of electromagnetism, CDs use pits (microscopic indentations) andlands(flat surfaces) to store information much the same way hard disks use magnetic and non-magnetic storage. Inside the CD-ROM is a laser that reflects light off of the surface of the disk to an electric eye. The pattern of reflected light (pit) and no reflected light (land) creates a code that represents data.
CDs usually store about 700MB. A DVD or Digital Video Disk holds even more information than a CD, because the DVD can store information on two levels, in smaller pits or sometimes on both sides.
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Are CDs and DVDs magnetic disks?
No. A CD is a type of optical media. An example of magnetic media would be tape (eg. VHS and cassette)
What are Hard drive removable disks and cds for a computer?
Hard drives, removable disks, and CDs are ways of storing information for computers. They make the process of backup up or moving data from a computer much easier.
What do CDs use to store data?
memory
Why is a DVD able to store 4.3GB of data even though it is the size of a normal CD?
Single layer recordable DVD's can store 4.3GB of data. Data is stored on CD's and DVD's via reflective and non reflective pits on the surface of the media. These "dots" are much smaller on DVD's which gives you more room to store information on the surface of the disc. Dual Layer DVDs hold 8.5GB. The pits on a DVD are much smaller and closer together than those on a CD. The new BlueRay disks can pack the pits even closer together because the blue light used to read them has a smaller wavelength and hence is able to resolve smaller details on a disks surface. CDs are read by a red or infrared light which has a much longer wavelength and is not able to resolve smaller pits on a disks surface.
What is the difference between Cds DVDs and Blu ray discs?
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.
Why dvds store more data than cds?
how much the CD storage
Hard disks CDs DVDs USB drives and floppy disks are?
Secondary Storage
How many disks do Stockholm CD boxes from The Container Store hold?
The Stockholm CD boxes from the Container Store can hold up to 20 CDs in jewel cases. These containers are sturdy however, and can hold products other than CDs as well.
What two places does a computer store data?
Computers store data in lots of places. The HDD (Hard Drive Disk) stores memory permanently. The RAM (Random Access Memory) stores memory in a faster to use format but it cannot store data once power to it is lost. (I.E., turning the computer off) The CPU (Central Processing Unit) stores information quite like RAM, only with higher efficiency) The GPU (Graphics Processing Unit) stores everything required to see what your computer is doing through the monitor. Disks (Floppy/Compact) store information like the HDD only the information is portable, Floppy disks are inefficiency, break easily and are very old technology whereas CDs (Compact disks) are newer, faster, have more storage and last longer. USBMSDs (Universal Serial Bus Mass Storage Devices) are little sticks you can plug into a computer that function like Floppy Disks and CDs but have MUCH more storage space and are a different shape to FDs and CDs. There are also a few other kinds of data storage device usable by PCs nowadays.
Is there a software that can burn any type of CD's or DVD's?
Yes there is Free DVD Cloner that is a program for Windows that allows you to Burn or grab any type of CDs or DVDs [Data CDs (or Mode 1 ISO CDs), Audio CDs] from an ISO image file. you can also burn and grab data DVDs, HD DVDs, Video DVDs and Blu-ray disks (ISO) .
What is a data storage device?
A storage device is piece of hardware which is used to store and save digital data. Typical examples of which are hard drives, Floppy disks CDs and DVDs, which are used in computers, ipods and Personal Video Recorders.
What type of secondary storage records data in small pits on the reflective surface?
optical. such as cds
