Worried about Hard Disk Drives and Solid State Drives, here in this article I will give you the information regarding HDD vs SSD which one better, HDD Vs SSD Comparison depending upon their advantages and disadvantages, physique and performance these drives are categorized.


First of all, let’s understand why do we need Secondary Storage Drives?

Primary memory is better than secondary memory in terms of speed, performance, and physique. But there are some drawbacks of primary memory some of them I have listed below-

  • Primary memories are volatile.
  • It comes with less storage capacity.
  • High cost per bit.

Here you understood that another additional memory is needed and hence a new memory is used which is non-volatile, providing you large storage capacity with a low cost per bit, i.e. Secondary memory.

Secondary Storage devices are of many kinds but in this article, we will discuss only on-

  1. HDD (Hard Disk Drive)
  2. SSD (Solid State Drive)

Now, let’s come onto the topic HDD Vs SSD one by one.

1). Hard Disk Drives (HDDs)

hdd vs ssd which is better?

It is the traditional disk drive used as secondary storage drives in computers or laptops. Hard Disk Drives are mechanical disk drives consisting of read/write head, motor, and platters mounted on a central shaft. These disks are coated with magnetic material which enables it to store data or information. The information is read/write by a metal head-mounted just above platters (disks) such that both don’t touch each other. The gap between them could range to 5nm.

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Following are the key features of Hard Disk Drive-

  • Low cost per bit making it cheaper and affordable for everyone.
  • Large storage capacity, which helps to backup your data daily.
  • It can be replaced easily, and replacing cost is also lesser than Solid drives.

2). Solid State Drives (SSDs)

It is a newer, faster, and more reliable storage device that is based on an integrated circuit to store data, typically using flash memory. These circuits are consist of semiconductor cells that store input data ranging from 1-4 bits in each cell. The architecture of cell makes it faster by increasing its processing speed also it does not contain any mechanical component, therefore, it consumes less power, this helps in increasing your device’s battery life

Based on the number of bits stored in each semiconductor cell it is of 4 types, SLC “single bit cell” most reliable, faster and expensive than ‘MLC’ and ‘TLC’ but quad bit cell ‘QLC’ is the cheapest one and commonly used SSDs in medium-range laptops.

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Following are the key features of Solid State Drives-

  • Faster processing then Hard Drives.
  • Due to its compact design with small size, bear up against physical damages.
  • The absence of mechanical motors makes it power efficient.

HDD Vs SSD comparison?

Here I will compare both drives in terms of their speed, pricing, capacity, power consumption, and their life span?

1). HDD Vs SSD: Speed difference b/w SSD and HDD?

In terms of speed, State Drives are far ahead then hard drives. As hard drive contains motor so, its speed is measured in RPM (Revolution per Second) higher the RPM faster the drive. But SSDs do not contain any motor (mechanical component) so its speed depends upon the technology and the data connection.

A Normal disk drive’s speed is measured in Megabytes per second-

Hard Disk Drive: 7200 RPM with 100 MB/s-150 MB/s.

Solid State Drive: 500 MB/s-600 MB/s.

2). HDD Vs SSD: Capacity and Price?

Here in this term HDD completely leads it provides you a huge amount of storage capacity, which can be helpful if you need to backup data daily. Its capacity ranges from 40 GB to 12 TB with an affordable price rate while on the other hand SSD provides only 160 GB to 256 GB in that price range. Thanks to technological advancement that now SSDs come with more storage capacity up to 1TB but it will cost you a huge amount of money.

3). HDD Vs SSD: Power consumption and their life span?

SSD is based on integrated semiconductor circuits that use less amount of power making it more reliable and increases its life span, while HDD uses motors that rotate at a very high speed which requires power and this makes it more powerful consumer.

The life span of SSD is less than HDD as it contains semiconductor cells which survives about 3000 write cycles but due to technological advancement and the Principle of Wear Leveling in SSDs controller checks that the write operation can be performed evenly on each cell, hence increasing its life span weather Hard Drives can survive for three to five years on an average.

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Finally, I hope you got information about HDD Vs SSD, WHICH IS BETTER? I hope the given information was helpful to you. You can ask any of the doubts in the comment section. Thank you for reading this article till the end.

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