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Data Recovery Blog

What are the Differences Between HDDs and SSDs

Aug 29, 2019

When it comes to data storage on computers, there are basically two things people can go for; hard disk drives and solid state drives. The former has long been the more popular of the two and has been the default storage device. However, of late, an increasing number of people are moving towards SSDs and they are being widely considered to be the better option because of the speed and security they offer. Let’s take a look at why that is by comparing HDDs and SSDs and making note of the differences that they have.

Hard Disk Drives

Having been used as the main storage device inside in computers for the last few decades, hard disk drives have been here for a while. They utilize magnetism as a means of storage. They are essentially made up of a number of rotating disks placed on top of each other, which each individual disk being covered by a magnetic material. The disks are collectively called platters and are toggled using an actuator arm. The actuator essentially finds the spot on the disks where data has to be placed or retrieved from. HDDs use binary as a means of data storage and store it linearly.

A number of problems exist in them because of how they are structured. First of all, hard disk drives have a number of moving parts and if a single one is damaged, the entire hard disk ends up sustaining damage. Moreover, due to the fact that it’s all magnetic, a magnetic force can end up influencing a hard disk. Finally, due to the way they work, hard disk drives are quite slow at times and when put under heavy load they can end up getting stuck. This makes them an inefficient means of data storage,

Solid State Drives

Solid state drives are a relatively newer means of storage when compared to HDDs. However, ever since they have been introduced their popularity has been rapidly increasing and they are quickly becoming the preferred option for those looking for a storage device. The reason for that has to do with the fact that SSDs are the faster option when compared with HDDs. Moreover, they are far less prone to getting stuck and even being damaged. A lot of the benefits of SSDs come from the way they are manufactured.

SSDs are flash drives. Rather than relying on magnetism for data reading and storage, they use flashes of light to gather data and store it. Moreover, the use transistors (sometimes called user cells as well) as their storage cells instead of using moving disks. The transistors read signals and accept them or reject them. An acceptance means a value of 1 being set and stored stored and a rejection means a value of 0 being held by the transistor. This setup makes SSDs far faster than your standard HDD and it also makes them less prone to damage. Since there are no moving parts, the entire SSD works homogenously at almost all times.

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