A hard disk or a hard drive is a stable device used to store data or information in the computer. Generally, the manufacturers attach the hard drive inside the computer. A hard drive connects directly to the disk controller of the motherboard of a computer. It consists of platters that are located in an airtight case. The users write the data on these platters, which contain a magnetic head. The platters spin very fast as the magnetic head moves over them.
The hard drives contain software data used to run the computers, confidential files for the users and the operating system.
History (hard drive)
IBM is the pioneer of hard drives. On 13 September 1956, IBM first introduced the hard drive to the international market. Its first version could not be removed from the system. Instead, the technicians installed it permanently to the computers. The inventors first used hard drives in the RAMAC 305 system whose capacity of storing data was 5 MB and its cost was 50,000 dollars. Later in 1963, they created a first-ever transferable hard drive, which had the storing capability of 2.6 MB. In 1980, IBM launched another one, which was able to store 1-gigabyte data, to the global market. Afterward, companies like Rodime and Seagate emerged in this field. In 1983, Rodime introduced a hard drive of 3.5-inch size with 10 MB storage capacity and Seagate discovered the first-ever 7200 RPM hard drive in 1992. Later in 1996 and 2000, they introduced one of 10000 RPM and 15000 RPM hard drive respectively.
Location of hard drive
The non-external hard disks are located in the data bay of a computer. The data bay is associated with the motherboard, which functions with the help of cables like ATA, SCSI, SATA. The power supply unit of the computers provides the power to those cables.
Types of Hard drives:
There are two main types of hard drives in the market. These are external and internal hard drives. The internal hard drives are readily available in the market. The external hard drives are also available and are used to support the data on the computers.
Manufacturers keep these external hard drives within an enclosure that shields the drives and allows it to port with the computers. The shapes and sizes of the external hard drives vary. Few are of the size of a book while others are like large smartphones. Normally the sizes of the hard drives vary by their types and ages. The storing capacity depends on the sizes of those drives. Older versions were able to store a maximum of several hundred GBs while the new version hard drives are capable of storing data of several hundred TBs.
Nowadays, most of the users use SSDs instead of hard drives. The SSD is faster than the HDD but the latter has a better storage capacity as compared to the former. The modern users use hard drives as a secondary storeroom for the computers to store documents, audio or video files, while using the SSD to store Operating Systems and software related data.