Solid State Drive (SSD) In 1995, M-Systems introduced the first flash-based solid-state drives. SSDs use non-volatile solid state memory like NAND flash or DRAM to store data without moving parts, distinguishing them from traditional hard disk drives. SSDs have significant performance advantages over HDDs with faster access times and read/write speeds, higher reliability since there are no moving parts, lower power consumption, and silent operation. However, SSDs currently have higher costs and offer less storage capacity than HDDs.

1. Solid State Drive (SSD)
Presented By:
Shyam Jos

2. Contents

Introduction

Form factor

Architecture & Function

SSD vs HDD – Start-Up Test

Technical Comparison of SSD & HDD

Advantages

Disadvantages

SSD Applications

Conclusion

3. Introduction

In 1995, M-Systems introduced first flash-based solid-state
drives.

A solid-state drive (SSD) is a data storage device that
uses solid state memory to store persistent data and SSDs use
same I/O interfaces developed for hard disk drives.

SSDs do not have any moving mechanical components, which
distinguishes them from traditional magnetic disks such as hard
disk drives (HDDs).

SSDs use NAND-based flash memory or DRAM to store data.

4. Form Factor

Standard HDD form factors

Box form factors

Bare-board form factors

Ball grid array form factors

5. Form Factor

Standard HDD form factors – is equal to size of traditional HDD form factors like
3.5", 2.5”
2.55’’ HDD form factor

6. Form Factor

Box form factors – mainly used by DRAM based SSDs ,as they need external
power supply or battery pack.
Box form factor

7. Form Factor

Bare-board form factors - Form factor which were more common to memory
modules(RAM)
Bare-board form factor

8. Form Factor

Ball grid array form factors - small chip package size to fit into Embeded systems
Bare-board form factor

9. Architecture & Function
Block Diagram

10. Memory
Flash memory-based SSDs:
use non-volatile NAND flash memory
Ability to retain the data without a constant power supply
lower cost compared to DRAM
Flash memory SSDs are slower than DRAM solutions.
DRAM-based SSDs:
Based on volatile memory such as DRAM
internal battery or an external AC/DC adapter is needed to
hold the data
ultrafast data access
primarily to accelerate applications
Higher cost compared to NAND flash memory

11. Controller
 The controller is an embedded processor and executes firmware-
level code.
Functions:

Error correction (ECC)

Wear leveling

Bad block mapping

Read scrubbing and read disturb management

Read and write caching

Garbage collection

Encryption

12. Cache or Buffer:

A flash-based SSD typically uses a small amount of
DRAM as a cache, similar to the cache in hard disk
drives.

13. Host interface
Serial ATA (SATA)
SAS - Serial attached SCSI (generally found on servers)
PCI Express
Fibre Channel (almost exclusively found on servers)
USB
Parallel ATA (IDE) interface (mostly replaced by SATA)

14. SSD vs HDD - Start-Up Speed Test
➔This video shows the speed differeence between a solid state drive and standard
hard drive on a Windows 7 PC.

15. Technical Comparison of SSD & HDD
Solid-state drive Hard disk drive
Random access time
0.1 ms
Random access time
5~10 ms
Read latency time
Very low
Read latency time
high
100MB/s to 500MB/s 50MB/s to 100MB/s.
High Reliability
SSDs have no moving parts to fail
mechanically.
Low Reliability
HDDs have moving parts and are subject
to sudden failure;
small and light in weight. relatively large and heavy
In 2013 SSDs were available in sizes up to
512GB,
In 2013 HDDs of up to 4TB were
available.
power consuption 2 watts 12 watts.
As of 2013 NAND flash SSDs cost about
Rs.31000 for 500GB
As of 2013 HDDs cost about Rs.3200 for
500GB drives

16. Advantages

High performance – siginificantly faster than a standard
HDD

Faster seek time – upto 60x faster than HDD

Higher reliablity – no moving parts,can withstand 1500Gs
operating shock

Lower power – Lesser power consuption ,cooler operation

Silent operation – ideal for post production enviornments

Lighter weight – perfect for portable devices

Wider operating Temp. - 0c – 70c

17. Disadvantages

They are more expensive than traditional hard
drives

They currently offer less storage space than
traditional hard drives.

Slower Write Speed on low-end Models(MLC
based types)

18. SSD Applications
Servers
Desktop computers
Laptops
Ultrabooks
HD Camcorders
Smart Tv
CCTV Digital Video Recorder (DVR)
Set-Top Boxes
Gaming Consoles

19. Conclusion
Faster Data Access
Less Power Usage
Higher Reliability
Latest high-end laptops and ultrabooks now
comes with SSD
In comming years SSD Will Replace Hard Disk
Drives

20. Questions ?

21. Thank You!