Difference Between HDD and SSD| Which is better SSD or HDD| Explanation of SSD, HDD and MHD

A computer basically has two types of memory. There is primary storage and secondary storage. Now the primary memory is temporary, i.e. RAM. However, the secondary storage is permanent and takes care of storage drives. 

• Now every computer needs a place. To save your data. Whether photos, documents, videos, audio files or an operating system, a computer needs a place to store this data internally on a storage drive. And these drives also need to be non-volatile, which means that they will store data even when the power is turned off. And there are several types of internal storage drives that a computer uses. And these drives can be magnetic hard drives, solid-state drives, or hybrid drives.

》Magnetic Hard Drives(MHD):

• So let's talk about magnetic hard drives first. Magnetic hard drives have been around since the dawn of computers. They were introduced by IBM in 1956 and although they have been around for a long time, they are still in use today. The hard disk is a sealed box that contains magnetic disks and the actual data is stored on these disks. 

• These disks rotate at high speeds and in doing so the actuator arm either writes data to the disks or reads data from the disks, depending on what the user wants to do. These magnetic disks can rotate at high speeds of 5,400, 7,200 or 10,000 rpm. The typical hard drive used in desktop computers today runs at 7,200 RPM. A cheaper desktop hard drive runs at 5,400 RPM, which is the speed of a typical laptop hard drive. High-end hard drives would run at 10,000 rpm. 

• However, these high-end hard drives are no longer widely used due to the high speeds of solid state drives that we will talk about below.Hard disks use the serial ATA interface today. This is now a newer standard that is faster than the outdated Parallel ATA interface. Instead of transferring the data on a parallel path, the data is transferred on a serial path, which means that the data is transferred one bit at a time. 

• SATA® drives have transfer speeds averaging 6 gigabits per second, which is considerably faster than the old parallel ATA. And hard drives also come in two physical sizes. 2.5 "and 5" drives are used by desktops and servers, and 2.5 "drives are used by laptops.

》Solid State Drive(SSD):

• Another type of storage device is called an SSD or Solid State Drive. Now these units have no moving parts. Therefore, instead of magnetic disks, these drives use flash memory chips to store data. Therefore the data transfer is very fast. Since they have no moving parts, they are also very quiet and more energy efficient. SSDs also come in a variety of form factors. They are available in a standard 2.5-inch rectangular form factor or a newer model. Form factor M. Both drives now store data in the flash memory, but connect to the motherboard via different interfaces.

• The standard 2.5-inch SSD uses the SATA interface as a hard drive and the M.2 SSD would be connected to an M.2 slot. And if you want to know more about the M.2 SSD. Compared to hard drives, SSDs are also more resistant to physical shock. However, if you physically hit a hard drive, e.g. SDs are also more expensive than hard drives, but you get what you pay for as they are significantly faster and you will notice a huge difference in performance of your computer, and they can also be used in desktop and laptop computers.

• Often times, due to the price difference between SSDs and hard drives, the computer can come with an SSD drive and hard drive if you had to buy a new computer drive.The fastest SSD would be a smaller capacity hard drive that contains all of the data that would benefit from the speed and that you would access frequently, e.g. B. the operating system, programs and documents. And the slowest hard drive would be a larger capacity hard drive that would be used as secondary storage. 

• For example, to store data that you would access less often or the drive would be used to store large files like videos. Now, you can buy or build a computer with a large SSD for all of your storage, but that would add significantly to the price of the computer and it is almost useless to have files on an SSD that you rarely access. 

To save money, computers use both an SSD and a hard drive. Now there is also a solution that allows you to use an SSD and hard drive as a physical drive instead of two separate drives. These are called SSHD or solid state hybrid drives. Now these drives combine the use of magnetic disks and flash memory.

》Hybrid Disk Drives(HDD):

• Hybrid drives take advantage of the large capacity and low cost of magnetic drives at the speed of an SSD. In a hybrid drive, magnetic disks are used to store data, while flash memory is used for data caching. And these units are practically automatic. The firmware in the drive really learns and decides for itself where the data is stored. 

• Frequently accessed files are cached and stored in flash memory, while infrequently used data is stored on hard drives. So remember, no matter which drive you use, all drives will crash at some point just from wear and tear. Always make a backup of your data. Personally, I use IDrive to back up my data and it backs everything up in the cloud. I've tried a few different backup programs, but I think IDrive is the best.

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