Secondary Storage

Disk Caching

Can be pronouce as cash. It is a high speed storage mechanism. There are two type of cache is commonly in used which is basically the Disk Caching and memory caching.

Memory caching is effective because the data can be reused again and again.

Rebundant arrays of inexpensive disks (RAID)

RAID combines two or more physical hard disks into a single logical unit by using either special hardware or software. Hardware solutions often are designed to present themselves to the attached system as a single hard drive.

File compression and decompression

Compression is minimizing the size in bytes of a graphics file without degrading the quality of the image.

It allows you compress and decompress data and files using standard well-known Gzip data compression engine.

Decompression is the process of retrieving compressed data.