How an optical drive reads data on an optical disc?

How an optical drive reads data on an optical disc?

An optical disk drive uses a laser to read and write data. A laser in this context means an electromagnetic wave with a very specific wavelength within or near the visible light spectrum. Different types of discs require different wavelengths.

How is data read from optical media?

An optical device writes data to them by shining a laser onto the disc. The laser burns pits to represent ‘0’s. The media can only be written to once, but read many times. Copies of data are often made using these media.

What type of optical disc that users can read from but not write to or erase?

CD-ROM

Is a high capacity optical disc on which users can read but not write or erase?

Chapter 7 – Storage

Definition	Term
High-capacity optical disc on which users can read, but not write or erase. See also digital versatile disc-read-only memory and digital video disc-read-only memory.	DVD-ROM

Is an erasable multisession disc you can write on multiple times?

A CD-RW is an erasable multisession disc you can write on multiple times.

What is the difference between CD R and CD ROM?

A Compact Disc Read Only Memory (CD-ROM) is a read-only disc. A Compact Disc Recordable (CD-R) is a Write Once Read Multiple (WORM) disc. These discs can only record data once and then the data becomes permanent on the disc. The disc cannot be recorded onto a second time.

What is an erasable optical disk you can write on multiple times?

cd RW

What two components does a computer use to transform raw data into useful information?

The Processor – The procedure that transforms raw data into useful information is called processing. The computer uses two components to perform this task – the processor and memory.

What is the number of bytes a storage medium can hold?

Cards

Term ______ is the number of bytes (characters) a storage medium can hold.	Definition Capacity
Term In RAID level 1, a backup disk exists for each drive.	Definition true
Term Manufacturers measure optical disc drives relative to the original speed, using an X to denote a transfer rate of ______ KBps.	Definition 150

What type of storage does not accept new information?

ROM is read-only memory, and typically, doesn’t allow changes. ROM can have information written into it only one time.

Which storage device is cheapest per MB?

Magnetic storage: Hard Disc Drive (HDD) Relatively cheap per unit of storage.

Which device storage capacity is largest?

What storage device has the largest capacity? For most computers, the largest storage device is the hard drive or SSD. However, networked computers may also have access to larger storage with large tape drives, cloud computing, or NAS devices.

What should you consider first when buying a storage device?

So before heading to the store to buy one, here are things you should consider first (e.g. various data storage example).

• Storage Capacity. Capacity refers to the amount of data that a data storage device can handle.
• Transfer Speed and Performance.
• Cache Space.
• Access Times.
• Data Safety.