SSD vs HDD: How to differentiate between SSD and HDD drives

SSD and HDD drives: What is the difference what is the difference between SSDs or HDDs? SSDs and hard disk drives are alike in terms of physical characteristics, however they are different in how they store data. 

There are pros and cons to each kind of storage device, so deciding the best one for you depends on how you utilize your computer. This guide on HDD as opposed to. SSD shows you how each kind of storage device operates and what it means to you.

Do you prefer your storage to be inexpensive and abundant as well as quick and resistant to shock? Find out how to decide between the traditional hard drive as well as a solid-state drive on your next computer.

If you purchased an ultraportable laptop in the past few years, you probably have a solid-state drive (SSD) as your main boot drive. 


The larger gaming laptops have shifted towards SSD boot drives as well, but only a small portion of budget laptops still use the use of hard disk drives (HDDs). 

The boot drives found in prebuilt desktop computers are mostly SSDs also with the exception of the most expensive models. In some instances desktops come with both, including both the SSD serving as the drive for boot, and the HDD for storage capacity. add-on.

If you must pick one one however, which do you pick which one? Let’s explore the distinctions in SSDs and HDDs and guide through the benefits and disadvantages of each one to aid you in your decision.

What is a Solid State Drive (SSD)?

Solid State Drive ( SSD) is an in-built, non-volatile storage device which keeps track of data and can retrieve it continuously using solid-state flash memory. 

The information is kept on flash memory chip interconnected, not platters, making SSDs more efficient than HDDs. They offer better performance when in comparison to HDD.

What is a Hard Disk Drive (HDD)?

An HDD makes use of magnetism that lets you save data on a rotating platter. It comes with a write/read head which floats over the spinning platter for reading as well as Writing to the information. The faster the spinning platter spins, the more efficiently an HDD can work. 

HDD also includes an I/O controller and firmware that tells the hardware how to operate and also communicates with the other systems. HDD is the full version that HDD is HDD refers to Hard Disk Drive.

How do hard drives function?

Hard disk drives comprise from one of platters that are magnetically sensitive as well as an actuator arm equipped with an read/write head for each platter and a motor that can turn the platters as well as move the arm. 

Additionally, there’s an I/O controller and firmware that instructs the hardware what it should do and connects to the other components part of the.

Each platter is divided in concentric circles referred to as tracks. Tracks are separated into logical units known as sectors. Each sector and track gives an unique address that is utilized to organize and track information. 

Data is transferred to the area closest to where it is. The algorithm analyses the data before it is written and allows the firmware to identify and fix mistakes.

The platters spin at preset speeds (4200 RPM to 7200 rpm for personal computers). The speeds are related to read/write rates. The greater the speed that is pre-set is, the more quickly the hard drive can be able to read or write.

Writing and reading

Every time you ask your computer to update or retrieve data The I/O controller informs the actuator arm in which area the data is stored and the read/write head is able to gather the data by studying whether or not there is charge at every address. 

If the request is to change the information the read/write head modifies the charge of the track or sector that is affected. The time it takes spinning the disc as well as for the arm of an actuator to locate the right tracks and sectors is referred to as latency.


The disadvantages of HDDs are due to the mechanical components utilized to write and read data because physically finding and retrieving data requires longer than using electronic methods to locate and retrieve data. 

Mechanical parts may fail or fail completely when handled rough or dropped. This is a problem in laptops, but it’s not as much for desktops. HDDs are also larger and require more energy similar SSDs.

Benefits of a HDD

The advantages of HDD is that they are a tried and tested technology and are often cheaper than solid state drive for the identical quantity of space. In the present, HDDs are also available with more storage capacity than SSDs.

What is an SSD?

Solid state drives make use of flash memory to provide the best performance and longevity. Because there are many tiny moving parts within your drive, including including magnetic heads spindles, spindles,

and spinning platters, it’s easy for something to fail and you may lose your valuable information. Without moving parts SSDs last longer, more efficient, and consume less power.

How NAND functions

SSDs are often considered as big USB drives. They use the same technology base. NAND, which is the technology used in SSDs is a kind of memory that is flash. At its simplest level floating gate transistors store charges (or the absence of charges) to store information. 

The gates are arranged into grids and then divided into blocks. Block sizes can vary however, every row in the grid is referred to as”a page.

An SSD controller is a device that performs a variety of functions that include monitoring where data is stored.

Writing and reading

It is more difficult to update data for SSDs. The entire data contained in a block has to be refreshed whenever the entire block is changed. The data in the old block is copied to new block, then the block is then erased after which the block is then rewritten using the updated data to the new block.

When you ask your computer to update or retrieve data or update data, the SSD controller scans an address associated with the data you requested and then reads the status of charge.

If the drive is not in use when it is idle, a process known as garbage collection takes place and ensures that the data on the block that was previously written to is removed and the block can be written back to.

There is a third process known as TRIM, which informs that SSD that it is able to skip the process of rewriting data whenever the block is erased. Because there is a limited amount of times a block can be written it is a crucial process which prevents premature wear and tear on the drive.

To reduce wear and tear on the drive, the drive has an automated system in place to ensure that every block within the drive is receiving an the same amount of read and write processes. This process is known as wear leveling, and it is automatically performed when the drive is in operation.

Since the process of reading and writing requires moving data around, SSDs are usually overprovisioned with storage. However, there always exists a certain portion of the drive not visible by the OS and is not accessible to users. This gives room for the drive to be able to move and erase items without impacting the total capacity of storage.


SSDs are a newer technology and , as such, tend to be more costly than HDDs. Even though they’re catching up however, it isn’t always easy to locate large capacity SSDs. HDDs can be as large as 2.5 times bigger.

Benefits of an SSD

What are the benefits of a solid state drive? SSDs offer faster loading time for gaming, applications and films. Due to the technology they utilize, SSDs are lighter and more able to stand up to movement and drops. Furthermore SSDs consume less energy, which allows computers to run cool.

One of the greatest advantages that comes with an SSD is how much more efficient they are compared to HDDs. For instance Crucial P5 can be described as our most powerful SSD using NVMe technology, with amazing read/write speeds of 3400/3000MB/s. In fact, portable SSDs are more efficient than HDDs. With read speeds of up to 1050 MB/s 1.and capacities that go up to 2TB the X8 can be up to 100 times quicker that USB flash drives and 7.5x quicker than traditional hard drives.

Advantages of HDD

Here are the pros and benefits of using an HDD:

  • It has a huge storage capacity.
  • The data stored is not lost even if the system is shut down.
  • It’s fixed in the computer and cannot be lost.
  • Computers are able to communicate with them quickly.
  • It is able to store information such as images, text documents videos, documents, etc.
  • HDD device is able to store operating system data and related files.
  • Its dimensions are small and is easily carried when in usage.
  • They are less expensive than SSD.

Advantages of SSD

Here are the pros and benefits of making use of an SSD drives:

  • SSD drives provide access speeds between 35 and 99 microseconds. This means it can provide up to 99 times more performance than HDDs
  • SSDs contain light components or moving parts, which means they’re more mobile and more suitable for continuous travel.
  • SSD drives are durable and extremely durable.
  • SDD makes use of flash memory in order to save data which gives it greater reliability.

Disadvantages of HDD

Here are the drawbacks and pros of using an HDD:

  • If the hard disk fails it will stop working. be able to function.
  • You could lose important files if your HDD drive is damaged or crashes.
  • If there is a failing hard disks it can be difficult to carry out the recovery of data.
  • The regular “head” can crash, which can damage the disc’s surface.
  • It is stored inside the computer, therefore it isn’t possible to transfer data to a different computer.

Disadvantages of SSD

There are pros and cons to using SSD

  • The initial cost for SDD is much more expensive than HDDs
  • SSDs come with a limit on the amount of time during which data can be erased, written and then rewritten onto part on the disk.
  • The storage capacity for an SSD is limited by the capacity of an SSD. However, advances with flash memory technology are constantly expanding the capacity of storage on SSDs.


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