Know your Hardware! (Hard Disk)

Hello Friends!
Sorry for the infrequent posts. I am busy in my training upto 19th of Sept. So I am getting less time to be with you. Let us be ahead about our Computer Hardware. Today we will discuss about Hard Disc. A Disc is some thing circular like Compact Disk. Why it is called hard disc. As it is an assembly of some magnetic delicate discs, encapsulated in a hard metal box. It is permanently fitted in the CPU box. This is a mechanical part of our CPU and the discs inside it are rotated by a spindle. It is a storage/memory device. Here we can store a large amount of our data, that can be retrieved as and when required by the processor. Magnetic heads are used to write and retrieve/read data from it by Processor.
The capacity of hard disk is measured in Giga Bytes (GB). Most common available hard disks are of 80/160 GB, these days. In the earlier days hard disks with much less capacities were used. Even in 1990s a hard disk with capacity of less than 1 GB was used. And these days after about a decade, we are using upto 500 GB hard disks even in our desktops. How ever as much capacity is not needed by an average user. For a home user 80 GB hard disk is more than enough. People like animators, graphic designers and gamers require high capacity hard disks.
The hard disk falls under the Secondary memory type, where a large amount of data is needed. Our operating system also resides on the hard disk. It is less speedy than primary memory which is faster and costlier. In our next post we will discuss more features of hard disks. Happy reading till then.