Secondary Storage

Compression is an act of condensing matter in attempt to reduce space. Hence, file compression simply means condensing files in the form of data in order to save space. This also helps to reduce the time taken for file transmission. File compression can be ranging from removing all extra space characters to replacing smaller bit strings with more frequently used characters.

A head crash in terms of the computing world refers to the collision that happens between the read-write head and the magnetic recording surface of any hard disk. This phenomenon is also sometimes referred to as disk crash. Such incident occurs when there is a physical destruction made to the hard disk. The collision between the two surfaces can also happen when there is misalignment or contamination with dust particles. Unfortunately, stored data in the hard disk will usually be destroyed and both the disk platter and the read-write head have to be replaced when there is a head crash.

An Internet hard drive is basically a virtual online data storage. Its allows end users to access computer files such as pictures, documents, audio and videos from any computer as long as there is access to the Internet. The good thing about Internet hard drive is that there are some such storage that offer unlimited disk space compared to the local hard drives which have limited space.

An optical disk drive functions somewhat like an optical disc processor. It reads or writes data to and from optical discs by using laser light or electromagnetic waves. Optical discs are composed of millions of small bumps and dips. To be enable to read these bumps and dips, optical drives contain lasers than can turn them into ones and zeros in order to be read by the computers.

A solid-state storage is a nonvolatile and removable form of storage that uses integrated circuits (ICs) instead of the usual magnetic or optical media. It is almost similar to the large-capacity and nonvolatile memory. An example of such storage is the flash memory Universal Serial Bus (USB) device which is very commonly used today. The absence of mechanical parts makes it possible for transmission of data to and from solid-state storage at a much higher speed.