What is Solid State Drive(SSD)?

What is SSD and Definition of SSD:-


It Stands for Solid State Drive. The SSD is a type of mass storage device similar to a hard disk drive (HDD). It supports reading and writing data and maintains stored data in a permanent state even without power. While SSDs works the same function as the hard drives does, their internal components are so different. Unlike hard drives, SSDs do not have any moving parts which is why they are called solid state drives. Instead of storing data on magnetic platters, SSDs store data using flash memory.

Techie Sanjeet Explains the SSD(Solid State Drive):-

SSDs have several other advantages over hard drives as well. For example, the read performance of a hard drive declines when data gets fragmented, or split up into multiple locations on the disk. The read performance of an SSD does not diminish based on where the data is stored on the drive. Therefore defragmenting an SSD is not necessary. Since SSDs do not store data magnetically, they are not susceptible to data loss due to strong magnetic fields in close proximity to the drive. Additionally, since SSDs have no moving parts, there is far less chance of a mechanical breakdown. 
SSDs are also lighter, quieter, and use less power than hard drives. 

This is why SSDs have become a popular choice for laptop computers.

Since SSDs have no moving parts, they don't have to "spin up" while in a sleep state and they don't need to move a drive head to different parts of the drive to access data. Therefore, SSDs can access data faster than HDDs.

While SSDs have many advantages over HDDs, they also have some drawbacks. Since the SSD technology is much newer than traditional hard drive technology, the price of SSDs is substantially higher. As of early 2011, SSDs cost about 10 times as much per gigabyte as a hard drive.
Therefore, most SSD drives sold today have much smaller capacities than comparable hard drives. 
They also have a limited number or write cycles, which may cause their performance to degrade over time. Fortunately, newer SSDs have improved reliability and should last several years before any reduction in performance is noticeable. As the SSD technology improves and the prices continue to fall, it is likely that solid state drives will begin to replace hard disk drives for most purposes.

solid state drive vs hdd
solid state drive

Different types of SSDs?

There are several types of SSDs with varying speed and connection types like  2.5", mSATA, M.2, and PCIe.

The types of SDD as follows:-

  1. 2.5": This is the most common type of SDD on the market. They offer the best value per GB and, while being the slowest, are still fast in speeds.
  2. mSATA: It stands for Mini-SATA, these SSDs have a very small form factor, a different connection type, and are a bare circuit board. They're a bit faster than a 2.5" SSD and are often used in laptops and  notebooks Pcs.
  3. M.2: Similar to mSATA, these drives are a bare circuit board. The significant differences are that they come in both SATA and PCIe versions, and that they have different lengths and widths, allowing for more flexibility. 
Note:-
Also, M.2 SSDs can support NVMe, which mSATA and 2.5" do not.
PCIe: These are the fastest and most expensive SSDs. As the name would imply, 
they use a PCIe slot (the same slot your video card uses). 
They offer speeds that are roughly four times faster than a standard SATA drive.

A solid state drive (SSD) is an electronic storage drive built on solid state architecture. 
SSDs are built with NAND and NOR flash memory to store non-volatile data and dynamic random access memory (DRAM).
A SSD and magnetic hard disk drive (HDD) have a similar purpose.

A SSD is also known as a solid state disk (SSD) or electronic disk drive.

SSD incorporates the storage technique implemented in microchip-based flash memory, 
where data is electronically stored on flash memory chips. 

Solid State Drive(SSD) is a kind of non volatile storage media that stores persistent data on solid-state drive. It uses flash memory. There are two components of SSD :-
1. A Flash Controller 
2. NAND Flash Memory Chips(FMC) :- 
The SSD(Solid-state-drive) architectural design is optimized to deliver high read and write operations for both sequential and non-sequential requests. It is also called flash drives or solid-state disks.

In a Hard disk drive(HDD) there is a moving part, but there is no moving parts in an SSD to break or spin up/down. A Hard disk consists of a spinning disk with a read or write head on a mechanical arm which is called an actuator. The hard disk are packaged in an integrated unit.
A Hard disk reads and writes data magnetically, which is one of the oldest storage media in continuous use. The magnetic properties can lead to mechanical breakdowns in a hard drive which causes some technical errors.

The two components of SSD:

  • Flash memory: Flash memory contains the storage memory.
  • Controller: An embedded microprocessor that processes functions, like error correction, data retrieval and encryption. 
Read about secondary memory :-
Read about HDD:
Click here:- Hard Disk Drive

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