Today I’m going to share a story with all of you. Most people use me to store their data But they are not caring about me. Some students learn about me because of their study purposes. So, therefore, today I think that I have to talk to you all. This is the story of my life. As the first time, IBM introduced me to the market on September 13, 1956. First, they used me in the RAMAC 305 system, with a storage capacity of 5 MB and a cost of about $50,000 ($10,000 per megabyte). I was built-in to the computer and I was not removable. In 1963, IBM developed me as removable, having a 2.6 MB storage capacity. And IBM developed me with a storage capacity of one gigabyte in 1980. I weighed 550-pounds and my cost was $40,000. Seagate was the first company to introduce me as a 7200 RPM in 1992. Seagate also introduced me as the first 10,000 RPM in 1996 and the first 15,000 RPM in 2000. Now you can see that I have developed in so many ways as the above. And also, Hitachi developed me with a storage capacity of 1 TB (terabyte) in January 2007 for the first time.
who am I
I am a Hard Disk Drive or in your word, I’m a Hard drive. I am a non-volatile data storage device. I am usually installed internally in a computer, attached directly to the disk controller of the computer's motherboard. I probably have one or more platters, housed inside of an air-sealed casing. Data is written to that platters using a magnetic head, which moves rapidly over them as they spin.
Why do you need me?
If you want to use a computer, your computer must have an operating system to allows you to use it. The operating system interprets keyboard and mouse movements and allows for the use of software, like an Internet browser, word processor, and video games. So, therefore, you need me (or another storage device like me) to install a computer operating system. Some users install two or more operating systems on the computer by partitioning me to the many parts.
You also need me for the installation of any programs or other files you want to keep on your computer. When downloading files to your computer, they are permanently stored on me until they are moved or uninstalled.
Can your computer work without me?
Without me, your computer can turn on and POST. Depending on how the BIOS is configured, other bootable devices in the boot sequence are also checked for the necessary boot files. For example, if the USB device is listed in your BIOS boot sequence, you can boot from a bootable USB flash drive in a computer without me.
What is my contribution to modern computers?
Modern computers often use my son, call SSD (solid-state drive) as the primary storage device, instead of me. I am slower than him when reading and writing data because I am older than him, but I offer greater storage capacity for the price.
Although I may still be used as a computer's primary storage, it has become more common to be installed me as a secondary disk drive. For example, the primary SSD may contain the operating system and installed software, and I may be used to store documents, downloads, and audio or video files.
Components of me
As can be seen in the picture above, I consist of the following components: the head actuator, read/write actuator arm, read/write head, spindle, and platter. On the back of me is a circuit board called the disk controller or interface board. This circuit is what allows me to communicate with the computer.
How am I connected to your computer?
As an internal hard drive, I connect to the computer using two means: a data cable (IDE, SATA, or SCSI) to the motherboard and a power cable to the power supply.
Where am I found on your computer?
I am found inside a computer case and are attached to the computer motherboard using an ATA, SCSI, or SATA cable. I am powered by a connection to the PSU (power supply unit).
What is stored on me?
You can use me to store any data, including pictures, music, videos, text documents, and any files created or downloaded. Also, I store files for the operating system and software programs that run on your computer.
How is data read and stored on me?
Data sent to me and read from me is interpreted by the disk controller. This device tells me, what to do and how to move my components. When the operating system needs to read or write information, it examines my FAT (File Allocation Table) to determine file location and available write areas. Once they determined, the disk controller instructs the actuator to move the read/write arm and align the read/write head. Because files are often scattered throughout the platter, the head needs to move to different locations to access all information.
All information stored on me, like the above example, is done magnetically. After completing the above steps, if the computer needs to read information from me, it would read the magnetic polarities on the platter. One side of the magnetic polarity is 0, and the other is 1. Reading this as binary data, the computer can understand what the data is on my platter. For the computer to write information to my platter, the read/write head aligns the magnetic polarities, writing 0's and 1's that can be read later.
Me as an external
Although mostly I have seen as an internal, and also I can act as a stand-alone device as an external or portable device that I back up data on computers and expand the available space. As an External drive, I am often stored in an enclosure that helps protect the drive and allows it to interface with the computer, usually over USB, eSATA, or FireWire. I come in many shapes and sizes. Some are large, about the size of a book, while others are about the size of a large smartphone. I can be very useful since they usually offer more space than a jump drive and are still portable.
SSDs instead of me
My son, SSD (solid-state drives) has started to replace me because of the distinct performance advantages he has over me, including faster access times and lower latency. While he is becoming more and more popular, I continue to be used in many desktop computers largely due to the value per dollar that my offer over him. However, more and more laptops are beginning to utilize him over me, helping to improve the reliability and stability of laptops.
Finally, I am getting older now, So as all human beings perish, I know that even my life will come to an end very soon. Before I am disposed and my life comes to an end, I would like to convey a message to all my friends - we Hard drives want to help you to the best of our capacity and capability. We want to be your best friend. Please do not misuse us and make us your enemies.