Secondary Storage

Disk Caching

A disk cache is a mechanism for improving the time it takes to read from or write to a hard disk. It can also be a specified portion of random access memory (RAM). Hard disk caches are more effective, but they are also much more expensive, and smaller. 

File Compression

File Compression is useful because it helps reduce the consumption of expensive resources, like hard disk space or transmission bandwidth. The compressed data must be decompressed to be used and it may be detrimental to some applications. 

File Decompression

A file decompression is an information density which encoding of data to consume less space and bandwidth. Data decompression is the reverse which the decoding of compressed data to restore the unique data.

Internet Hard Drive

An Internet hard drives also known as i-drive or online storage. Internet hard drives can access information from any location using the Internet. It also oriented to either businesses or individuals.

Optical Disk Drive

In computing, an optical disc drive which is ODD, is a disk drive that uses laser light or electromagnetic waves. It nears the light spectrum as part of the process of reading or writing data to or from optical discs.

Solid-State Storage

A solid-state drive (SSD) is a data storage device that uses solid-state memory to store persistent data. It is the equivalent of large-capacity, nonvolatile memory and used to record MP3 music files and stored images captured from digital cameras then transfer the images to pc.