Optical Storage Devices: Optical storage devices are flat, round disks that spins around its center. The difference with magnetic storage device is that in optical storage devices LASER light is used to read and write data in disks.
What is ROM in computer? Short for read-only memory, ROM is a storage medium that is used with computers and other electronic devices. Unlike RAM random access memory , ROM is non-volatile, which means it keeps its contents regardless of whether or not it has power. How reliable is magnetic storage?
In this context, magnetic tapes are now living a second youth. This solution is proven and stable — for decades it has been used for data storage and is considered safe and extremely reliable.
In the times of pressing for better hardware parameters, particularly speed, tapes were predicted to vanish quickly. Is Flash Memory volatile or nonvolatile? Flash memory is an electronic solid-state non-volatile computer memory storage medium that can be electrically erased and reprogrammed. What is meant by cloud storage? Cloud storage is a cloud computing model in which data is stored on remote servers accessed from the internet, or "cloud. What is Matchboard timber? What is internal and external criticism of historical sources?
Magnetic drum was used as a primary memory in computers, in to But, now it is replaced with secondary storage medium. It contains the metal cylinder which is coated with magnetic iron-oxide material on which all data files or folders can be saved.
Magnetic drum is not physically removable device, because it is permanently placed in the computer. It is capable to access data at higher rate compare to tape or disk storage devices but its storage capacity is lesser to them. Zip diskette was developed by Lomega Company, and it was an advance technology to tradition floppy disk, and it was used as a secondary storage device.
Zip drive is used to operate the Zip disk. Zip disks had and MB storage space that was used to save, share and back up huge amount of data. But, now Zip disk is not getting popular in the market. SuperDisk is introduced by Imation organization that is supported with enlarge high density. SuperDisk has capable of MB storage over single disk similar size of oldest 1. Section 3. In this section you will see the 4 different types of magnetic storage media.
Key Concepts of this section:. Be able to discuss advantages and disadvantages of each magnetic media. Examples of Magnetic Storage Media. The table below shows you some examples of magnetic storage media. Click each of the media to move to more information:. Fixed Hard Disk Drive. Magnetic storage media uses a magnatised surface area in order to hold bits of information. The following sections will help summarise each of the 4 different magnetic storage media. For each one you will see:.
A summary of a fixed hard disk drive. Click to zoom. Fixed hard disk drives are designed to be 'fixed' into the computer and not removed. Fixed hard disk drives store data on magnetically coated disks known as platters. Used on all computers and are the main method of storing data. This is because they are capable of very fast direct access of files and have very large storage capacities.
The disc surface Platter is coated in a magnetic film which is where the data is stored. Hard Discs are used to store operating systems , software applications and all other files. Typical storage spaces are gigabytes up to 4 terabytes 4, gigabytes. Used to store the operating system and applications software Windows, Word, Excel etc. Used for storing files and documents music and homework for example. Real-time systems robots, chemical plant control systems and online systems booking airline tickets etc use hard disc drives to store data.
Fixed hard disk drives have very fast data access speeds and so can handle this. Used in file-servers on computer networks to store files Like the student: drive in your school is used to store your work. Can be damaged easily when computer is not shut down properly Disc crash! Huge capacities Can store thousands of movies and music files. Portable Hard Disk Drive. A summary of a portable hard disk drive. Portable hard disk drives are protected from damage by a tough outer casing.
Portable hard disk drives are small and light. Portable hard disk drives connect to almost any other computer via usb.. Works in a similar way to fixed hard discs but are c onnected to the computer externally via a Universal Serial Bus USB port. Portable Disc Drives are designed to be transportable. Because they are used outside of the computer they come with protective casing to avoid physical damage to the disc drive.
Typical storage spaces are gigabytes up to 3 terabytes 3, gigabytes. Like fixed hard drives, they are used to store large files such as video. Can be used as portable back-up systems to avoid loss of data.
Used to transfer data , files and software between computers via USB connectivity. Their protective casing makes them harder to damage whilst in transport. Small size makes them easy to misplace or have stolen.
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