SSD Full Form

What is the Full Form of SSD?

The full form of SSD is Solid State Drive. SSD does not use Mechanical Components like HDDs. HDDs use Disks to store and retrieve data by revolving very fast at about 5400rpm or 7200rpm, but SSD use chips to store and retrieve data. SSDs are faster than HDDs because the speed of HDD depends upon the rate of revolution of the disks contained inside, whereas SSDs have no such concept of disks.

History of SSD

SSDs were offered in the late 1980s by Zitel as a family of DRAM-based products, under the name “RAMDisk”, for use on systems like UNIVAC and Perkin-Elmer. In 1999, a number of introductions and announcements were made by BiTMICRO, about flash-based SSDs, including a 3.5-inch, 18GB SSD. In 2007, a PCIe-based Solid state drive was announced by Fusion-io. It had a capacity of doing about 100, 000 I/O operations per second (IOPS) of performance in a single card, with storage capacities up to 320 GB.

Components of SSD

There are 2 components of SSD and are as follows –

1. Flash Memory Chip –

Flash memory is widely used to store data and code and is used in embedded systems to store information on a solid-state flash drive containing a drive for storage. The SSD has interlinked chips of flash memory that are made of silicon. Thus, to accomplish different densities, SSDs are developed by stacking chips in a grid.

2. Flash Controller –

Flash Controller is an in-built microprocessor that handles operations. It also monitors control between SSD and the host machine for I/O (input/output) and R/W (read/write) functions.

Characteristics of SSD

• Start-up Time – Because SSDs do not use any mechanical component hence it takes almost negligible startup time.
• Random Access Times – Accessing data directly from the Flash memory creates a lag-free experience for its users.
• Read Latency time – Accessing data from Flash memory also reduces the read latency time to very low.
• Data transfer rates – Higher Data Transfer rates of about 100-600 Mb/sec.
• Fragmentation – There is no such concept of Fragmentation in SSDs.
• Noise – As they have no mechanical part they create zero noise.
• Reliability – SSDs are reliable as there are no moving parts that can wear over time.
• Operating Temperature Range – SSDs can operate effectively in a wider temperature range compared to HDDs.
• Shock and Vibration Resistance – They are highly resistant to shock and vibration, making them ideal for use in portable devices like laptops, tablets, and rugged environments.
• Boot Time and Application Load Times – SSDs reduce boot time of Operating systems and other applications.
• Security features – SSDs offer advanced security features like hardware encryption and secure erase functions to protect data from unauthorized access.

Benefits of using SSD

• Higher performance rate as compared to HDD
• Energy uses are very low
• Highly durable.
• Less weight and no noise
• More practical sizes/form factors

Disadvantages of using SSD

• The cost of SSDs is very high
• Storage capacity is low compared to the cost
• The lifecycle of SSDs is shorter than HDDs