The document discusses the comparison between Hard Disk Drives (HDD) and Solid State Drives (SSD), outlining their structures, merits, demerits, performance, reliability, and power consumption. It emphasizes that although HDDs have larger storage capacities, SSDs are superior in terms of speed and reliability, suggesting that SSDs will eventually replace HDDs. The conclusion highlights the evolution of data storage technology and the significance of these differences.

2. Herat University
Faculty of Computer Science
Network department
VS
Scientific writing
:Research
Mohibullah ( Afghan )
ID : 22013

3. Content
OIntroduction
OHDD structure
OSSD structure
OSSD Merits & HDD Demerits
OHDD Merits & SSD Demerits
OConclusion
1

4. Introduction
OData storage devices
O Popular in our lives
O Known as secondary storage devices
O2 types of data storage devices
OHard Disk Drive (HDD)
OSolid State Drive (SSD) 2

5. nd
OHDD Structure :
O Magnetic coating on metal platters
O Data are read/written by movements of
magnetic heads.
spindle
Head
platter
3

6. Background
SSD Structure :
 Controller and NAND flash memory
chips
 Data are read/written by read/write
functions
 Use transistors
NAN
D
4
controller
SATA connector

7. HDD
Demerits
SSD
Merits
5

8. Performanc
e Copy 6 GB /s
 Read/write
200-550 MB/s
 Boot S 10-13 Seconds
SSD :
HDD :
 Copy 200 MB /s
 Read/write 50-120 MB/s
 Boot S 30-40 Seconds 6

9. Reliability
7
HDD SSD
3% 0.5%

10. Weight
47
gr 60
gr
64
GB
60 GB
8

11. 6 -7
Watts
2 - 3
Watts
Energy saving ability
9
HDD SSD

12. Heat, Vibration, Noise
10

13. SSD
Demerits
HDD
Merits
11

14. SSD
Price
Difference
12
HDD

15. Capacity
 1TB Max
notebook size
 4TB max
desktops size
SSDs
 2T B Max
notebook size
 10 TB max
desktops size
HDDs
13

16. Conclusion……..
Performance
Reliability
Power consumption
Heat, vibration, noise
In coming years SSD Will
Replace Hard Disk Drives
14

17. Thank you for your
kind attention

18. References
O HDD Problem & solution
O http://www.computerhowtoguide.com/2014/08/hard-disk-
problems-solutions.html
O SSD vs HDD
http://www.storagereview.com/ssd_vs_hdd
O What is Solid State Drive
http://www.pcmag.com/article2/0,2817,2404258,00.asp
O What is Hard Disk drive
http://www.computerweekly.com/feature/Hard-drive-capacity-
emphasized-over-performancefor-future-enterprise-hard-drives