Solid State Drive (SSD) is a storage device that uses solid-state flash memory rather than a rotating magnetic medium. SSDs provide faster access time and have no moving parts, compared to traditional hard disk drives (HDDs). SSDs use flash memory, either NAND or NOR types, and store data in semiconductors rather than on magnetic disks. While SSDs are more expensive than HDDs, their performance advantages, such as faster read/write speeds and more durability, make them suitable for applications requiring quick access to large amounts of data.

1. Solid State Drive
PRATEEK KUMAWAT
BTech CSE III SEM

2. 1. What is SSD?
2. Why use SSD?
3. How does it work?

3. •Solid State Drive is an memory storage device that stores data
on solid-state flash memory.
•SSDs term refer a storage medium through semiconductors
rather than a magnetic media.
•SSD stores data much faster than a HDD. It doesn’t contain
any magnetic moving part like HDD.

4. SSD vs HDD
Advantages
Start-up time
Random access time
Read performance
Data transfer rate
Noise
Temperature
Power consumption
Read/write symmetry
Reliability and lifetime
Weight and Size
Mounting
No danger
Free block availability
Disadvantages
Cost
Storage capacity
Magnetic field
Fragmentation

5. SSD vs Memory Card
•SSDs made to install in computers but memory card is portable device which can
use in smartphone and other devices.
•SSDs and memory card both based on flash memory but different in
performance, size, power consumption and lifetime.

6. Application
•To create network appliances
•Write-locking
•Hard drive caching
•Solid-state hybrid drives(SSHD)
•Wear leveling
•Data recovery and secure deletion

7. Technology used in SSDs
•Magnetic core memory(1950)
•Card capacitor read only store(1950)
Both are origin of SSDs in the time of vacuum tubes. But failed due to the
cheaper drum technology.
•Electrically alterable ROM(1970)
It is failed due to less lifetime.
•Flash-Based SSDs(1995)
Introduced by M-system in 1995.In 1999 BitMicro introduce a 18gb SSD and
then in 2009 OCZ made a 1TB SSD.
•Enterprise flash drive(2008)
It is used in ultrabook and introduced by EMC corporation in 2008.

8. Architecture
•Controller
The controller is an embedded processer that incorporate the electronics
that bridge the NAND flash memory to the host computer. It plays some
functions like Error-correcting code, wear leveling, bad block mapping,
encryption etc.

9. •Memory
1. Flash-based memory
 Most manufacturers use non-volatile NAND flash memory in the construction. it
is cheaper than DRAM and have the ability to retain data without a constant
power supply.
2. DRAM-based
 Volatile DRAM based memory SSDs is ultrafast and used to accelerate
applications. It requires internal battery source because if power is lost than the
battery provide power while all information is copied from RAM to backup
storage.
•Others
1. MRAM(Use both DRAM and flash memory.)
2. Cache and buffer(flash based SSD uses some part of DRAM as buffer)
3. Battery and capacitor(to hold data when power lost)
4. Host interface (to connect to computer)

10. Configuration
•Standard HDD form factor
•Standard card form factor
•Disk on a module form factor
•Bare board form factor
•Ball grid array form factor

11. Conclusion
•SSD is faster than an HDD
•SSD is more Reliable than HDD
•SSD doesn’t make noise and vibration.
•SSDs are costlier than HDDs. But SSDs cost is decreasing
by improvement in the technology. According to an case
study 39 million units sold in 2012 and expect to increase
more than 200 millions till 2016.

12. Thank You