Hard disk is one of the main components on a computer. The main function of the hard disk is to store and read data on the device.
Hard drives or often also referred to as HDDs are installed in desktop computers, mobile devices, electronic devices, to corporate data centers.
This magnetic disk data repository can be used to store operating systems, software programs, and other files.
Well if you want to know more about what a hard drive is, you’ve come to the right place!
This article will cover everything you need to know about it. Starting from understanding, types, to the function of the hard drive.
Let’s just get started with the article!
What is a Hard Drive?
Hard Disk Drive which is often also referred to as a hard drive, hard disk and HDD is a data storage device non-volatile.
Storage non-volatile means the storage device will retain the stored data even if the primary device is turned off.
Generally, the hard drive is installed internally in a computer device. This component is attached directly to the disk controller computer motherboard.
This hard disk component contains several disks (disks). Later, the data will be saved to disk
using a magnetic head that moves quickly when the disk rotates.
Storage devices such as hard drives are indeed needed to install operating systems, run programs & applications, and, to store documents.
No device non-volatile like HDD which can store data after shutting down, computer users will not be able to store anything on the computer.
This is why every computer needs at least one storage device to store data permanently.
Well, in 1953 engineers at IBM wanted to find a way to provide random access to high-capacity data at low cost.
That’s where hard disks are found. When it was first sold to the public in 1956, HDDs were the size of a refrigerator, you know, Golden friends!
The hard disk can only store 3.75 MB of data. Fortunately, these hard disks continue to evolve along with technological developments.
In the mid-1980s, the 3.5-inch and 2.5-inch form factors were introduced and have become the standard in computers today.
Read also: What are SSDs? Understanding & Differences with HDD
How Hard Drives Work
Basically, a hard disk consists of several disks made of aluminum, glass or ceramic.
Next, the disk is placed on a shaft. The disc rotates with a motor connected to the shaft.
Inside the hard disk case is a read/write needle that magnetically records information to and from the tracks on the disk using a magnetic head.
Hard drives also have a thin magnetic layer on them. The motor inside rotates the dish at up to 15,000 revolutions per minute.
As the platter rotates, a second motor controls the position of the read and write needles which record and read the information on each platter.
Hard Drive Function
After studying the meaning and workings of a hard drive, of course you can already guess the main hard drive function, right?
Basically, a hard drive is a secondary storage device designed to store data permanently.
This secondary storage device includes a larger storage capacity compared to the primary device.
Hard drives can store various types of data. Starting from the operating system, software, and other computer files.
Some other hard drive functions are:
Saving Data Software
Another hard disk function that is almost the same as its main function is to store third-party software data on the computer.
Data storage from this software is done so that the software can be opened and run on a computer device.
In addition to storing data, some people use the hard drive to backup their websites and computer files.
Thanks to the large hard disk storage capacity, this secondary storage area is indeed suitable for backup.
Generally when your computer is damaged, the files in this second storage area will remain safe and accessible.
The good news, the hard drive also provides a portable external type, you know, Golden friends! So you can save data on different devices.
Types of Hard Drives
Well, here are the various types of hard drives available today with different interface technologies and storage capacities.
SATA (Serial Advanced Technology Attachment) is a serial interface used to connect hard disks.
Thanks to its very cheap price, SATA is often used in PC devices as well as servers.
The speed of the SATA interface is up to 600Mb/s with a throughput of 6Gb/s, you know. HDD with SATA is suitable for:
- Workflow operations, for example, video coding
- Data storage
- Backup system backup
- Big file server but not loading high
SAS-(Serial Attached SCSI) – is a serial interface used to connect hard disk drives based on the SCSI command set.
The SAS interface operates at speeds up to 1,200Mb/s. with throughput up to 12 Gb/s. Unfortunately the price of SAS is more expensive than SATA.
HDDs connected via the SAS interface are suitable for high speed operations with multiple rewrite cycles as well as:
- Database management system (DMS)
- High loaded web server
- Distributed system
- Systems that handle multiple requests such as terminal servers, etc.
Hard Disk Capacity
Some of the most common hard drive storage capacities are:
- 16GB, 32GB and 64GB — the capacity of this hard disk range is included in the lowest group. Usually found in older and smaller devices.
- 120GB and 256GB — Hard drive sizes in this range are generally considered entry-level for HDD devices such as laptops or computers.
- 500GB, 1TB and 2TB — hard drive storage this one has a capacity of about 500 GB. Often considered a decent standard for the average user.
- More than 2TB — hard drives with a size of more than 2TB are suitable for users who have files of high size and resolution.
So, that was a complete explanation of what it is and the function of the Golden Friends hard drive! Surely now you understand more about HDD, right?
Hopefully this article is useful. If you still have questions about what a hard drive is, don’t forget to leave a message in the comments column below, Golden Friends!
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