Understanding Hard Disk Drives
The term hard disk drive is used to refer to a disk that acts as the storage area for data on a computer. It’s important to understand that not all computers have the ability to use this type of drive. They will always be the storage medium for most computer types.
The solid state technology that allows computers to function with hard disk drives was the first, but the technology has evolved to enable systems that use the technology as well. Most of the data on a computer today is stored on a computer’s hard disk drive. The other types of storage media are provided by the computer’s ROM and the solid state RAM.
A hard disk drive is actually divided into two separate parts.
The platters are made of semiconductor material that uses magnetism to spin. They are the ones that store data on a hard disk drive. These platters are made of conductive material, such as plastic or silicon, which makes them harden when they are struck by a magnetic field.
A computer can use either solid state memory or the hard disk drive. Both require maintenance and repair, so it’s essential to have both installed.
These days, people have computers that use many different types of storage media. Some are obsolete, but many still operate today. Many older systems still work with standard tapes or hard disk drives, so it’s easier for some to install than newer machines that utilize other types of media.
Because there are so many types of media in today’s computers, there are too many files for one physical disk. So for some, the logical hard disk drive is more cost effective because it’s easily moved from one location to another without taking up space.
The disk that acts as the storage area for the operating system, programs, the internet, and other data is called the cache disk. This is simply the part of the disk drive that keeps things like settings and stored passwords.
There is also the physical disk that holds the data. This is the part of the disk drive that is physically accessed repeatedly. However, each time it is accessed, it is read from one of the platters and the data that are written is corrected if needed.
There are three different types of drives. They are the spin drive, the spinning magnetic disk, and the magnetic recording device.
When the hard disk drive spins, the signals are sent to the computer and the data is read out of the drive. This type of drive is able to read all of the information from the disk as long as the drive is turned on. Once it is turned off, the information is erased from the disk.
- The spin drive, or magnetic recording device, is a smaller version of the spin drive that rotates instead of spinning.
- It also doesn’t take a spinning disk to spin, so it is more compact and more affordable.
- It works with magnets to spin, and reads the data from it.
Magnetic recording devices are also used as a backup in times of power outages, as well as for backup data in case a hard drive fails. These hard disks are also used in data recovery in cases where corrupt data may have been removed from the drive.