Hard Disk Drive vs Solid State Drive
(HDD VS SSD)
Hard Disk Drive(HDD):-
An HDD is a data storage device that lives inside the computer. It has spinning disks inside where data is stored magnetically. The HDD has an arm with several “heads” (transducers) that read and write data on the disk. It is similar to how a turntable record player works, with an LP record (hard disk) and a needle on an arm (transducers). The arm moves the heads across the surface of the disk to access different data.
Solid State Drive(SSD):-
SSDs got their name—solid state—because they have no moving parts. In an SSD, all data is stored in integrated circuits. This difference from HDDs has a lot of implications, especially in size and performance. Without the need for a spinning disk, SSDs can go down to the shape and size of a stick of gum (what’s known as the M.2 form factor) or even as small as a postage stamp. Their capacity—or how much data they can hold—varies, making them flexible for smaller devices, such as slim laptops, convertibles, or 2 in 1s. And SSDs dramatically reduce access time since users don’t have to wait for platter rotation to start up.
Comparison Between Hard Disk Drive(HDD) and Solid State Drive(SSD)
HDD VS SSD (DIFFERENCES)
|Excellent||Moderate as compared to SSD|
|Durability||More||Less as it is susceptible to vibration|
|Running capabilities||Need less space and energy.||Greater space is needed along with high energy cost.|
|Access time||Smaller than 100 microseconds.||2.9 – 12ms|
|Seek time and rotational latency||Superior to HDD.||Less relatively as it requires to spin to acquire data.|
|Instantaneous startup needs about a few milliseconds.||More than SSD about a few seconds.|
|Data transfer rates||Provides good speed of data transfer.||Inferior to SSD.|
Solid State Drive(SSD)
Components of SSD
The chief components of the SSD are controller and memory. Controller constitutes the main processing unit which links the NAND memory elements to the host computer and executes the firmware level code. It covers a large part of the performance of the SSD. Another component of SSD is the memory which stores the data by using integrated circuits, for example, NAND flash and DRAM.
Working of SSD
The first operation is performed by the host where the data is sent to the SSD controller. The controller decides whether to write the data to the NAND memory. This process is similar to the RAID where multiple NAND chip simultaneously written by the controller.
Hard Disk Drive(HDD)
Components of HDD
The main parts of HDD are platter and head. The platter is a circular disk coated by a magnetic material which holds the data. These platters can spun at the speed of 5,400 to 7,200 rotations per minute. The read and write head also contains a magnetic yoke and coil to detect and alter the magnetic field (value) on the spinning platter.
Working of HDD
A platter (magnetic disk) is rotated at high speed with the help of a motor. The head is positioned over the appropriate location using an arm to read and write the data. During the read operation, the head detects the magnetic value. The head modifies the magnetic value during a write.
HDD VS SSD (ADVANTAGES& DISADVANTAGES)
Advantages of SSD
- It is very fast.
- Does not produces vibrational noises and heat.
- Shock resistant.
- Consumes low power.
Disadvantages of SSD
- The flash memory used in SSD become unusable after performing few writes.
- Fragmentation issues.
- Cost is high (memory per bit is high).
- Large files can certainly degrade performance.
Advantages of HDD
- Easily available.
- Works well with the large files too.
- Provides a larger storage at smaller amounts.
Disadvantages of HDD
- Slower than SSD.
- Produces heat and susceptible to shock and vibration.
- Requires larger space.
I hope I have cleared all of your queries and doubts about HDD vs SSD topic. If haven’t please leave comment. I will surely help you about this topic.