Difference Between HDD and SSD

27 October 2020 Posted by Aman Pachisia 6 Min Read

Key Difference Between HDD and SSD

HDD is an electromechanical storage device, which is called Hard Disk Drive. It used magnetic storage for stored and fetch digital data. HDD is installed internally in our computer systems, which is connected from disk controllers of the motherboard. HDD is a storage device that stores the operating system (OS), installed software, and other computer programs. The basic hard drives consist of a number of disk platters that are positioned around a spindle inside a sealed chamber. The chamber also includes read-and-write heads and motors. The motor is used to spin the platters, which hold the data, at up to 15,000 rotations per minute(RPM). As the platters spin, a second motor controls the position of the read-and-write heads that magnetically record information To, and read information From, tracks on each platter.

SSD is a non-volatile storage device, which is called Solid State Drive. SSD stores the data on flash memory chips and manages the data in an enduring state, even when the power is off. In comparison to electromechanical drives, SSDs are generally more resistant to physical shock, run silently, and have quicker access time and lower latency. SSDs work differently than a traditional hard drive (HDD) as there are no moving parts. Whereas HDDs used spinning disk platters to access information, SSDs stored data on flash memory chips, much like a smartphone, USB drive, or slimline tablet. Since the drive doesn’t have to wait for any platter to spin to where your data is located, all memory chips are accessible at the same time. This makes it much easier for users to access their information at high speed.

Advantages of SSD

  • Very high speed.
  • Resistant to shock.
  • Low power consumption.
  • Long lifespan.
  • No noise.

Types of SSD

  • mSATA
  • 2
  • PCIe
  • NVMe

Comparison Between HDD and SSD


Components HDD SSD
Full-Form HDD stands for Hard Disk Drive. SSD stands for Solid State Drive.
R/W Time HDD has longer R/W time. SSD has a shorter R/W time.
Latency HDD has higher latency. SSD has a lower latency.
Components HDD uses moving mechanical parts, like the arm. SSD does not use, mechanical parts, use only electronics parts like ICs.
I/O operations per second HDD supports fewer I/O operations per second. SSD supports more I/O operations per second.
dissolution HDD has dissolution. SSD does not have dissolution.
Weight HDD is heavier in weight. SSD is lighter in weight.
Size HDD is larger in size. SSD is smaller in size.
Reliability HDD is less reliable due to the possibility of mechanical failure. SSD is more reliable.
Data Transfer In HDD the data transfer is sequential. In SSD the data transfer is random access.
Cost HDD is cheaper. SSD is costlier.
Time of Release HDD is older and more traditional. SSD is the latest technology in storage devices.
Noise HDD can produce noise due to mechanical movements. SSD does not produce noise.



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Arun Kumar(Entrepreneur, Blogger, Thinker & SEO Expert)

Arun Kumar (Solopreneur, Blogger, Thinker & SEO Expert)

Hello, I'm Arun, Currently holding position as Head of Digital Marketing having 8+ years of experience. I specialize in lead generation through Facebook and Google Ads, as well as excelling in SEO, SMO, SEM, and SMM to craft captivating online presences. I'm driven by a strong sense of ownership, motivation, and an insatiable curiosity for learning. I orchestrate strategic promotions, measure KPIs, and craft compelling marketing campaigns. My email marketing strategies are designed to elevate brand visibility and product awareness. I'm also a dedicated mentor, guiding team leaders and executives to success. Let's connect and explore how I can add value to your digital marketing efforts.

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