This presentation gives you about types of storage devices, how it is interfaced and new trends in it.

1. By
R.PradeepRaj
(pradeeprajr93@gmail.com)

2. 




STORAGE DEVICES AND ITS TYPES
HDD AND SSD(FLASH)
INTERFACING
NEW TRENDS
PROS AND CONS

3. Device(space) used to store something !

4. 
Device use to store information in magnetic
or digital form in temporary or permanently
and reproduced whenever required.

6. MAGENETIC STORAGE
 TAPE DRIVE
 FLOPPY DISK
 HARD DISK
OPTICAL STORAGE
 CD ROM
 DVD ROM
FLASH STORAGE
 FLASH DRIVES (PEN DRIVE)
 SOLID STATE DEVICE(drive)
HYBRID DISK DRIVE
CLOUD STORAGE

9. •
.Disk
spins 120 times per second (7200
RPM/60)
•
Each spin transfers a track of 80 KB (160
sectors x0.5K)
•
Sustained average transfer rate is 120x80 =
9.6MB/s.

10. Dr.FUJIO MASUOKA ( TOSHIBA)


NOR based flash
Allow Random Access
High cost and less durable
Direct code execution
NAND based flash
No random-access external address bus
Mass storage
miniSD, microSD  64MB to 64GB

11. 
Storage device that uses flash technology but
comes in the form factor of a conventional
hard drive.

12. 
Wear levelling
◦ Counting writes & dynamically remapping blocks

Bad block management
◦ Write verification and remapping bad sectors

Multi-Level Cell technology
◦ Memory cells store more than one bit

13. PARELLEL ATA

16 bit parallel data bus

40 pin cable

Signal crosstalk
 SERIAL ATA

7 pin cable

25% of space by PATA

3Gbits/sec


14. 
Fire Wire

USB

Fibre Channel

IDE

15. 


Many inexpensive to form a SLED
Mirroring
Duplicate every disk
Parallel Disk Systems
Data Striping

16. Selecting a RAID Level
•
RAID 0 – High-Performance applications where
data loss is not critical
•
RAID 1 – High Reliability with fast recovery
•
RAID 5 – Preferred for storing large volumes of
data
•
RAID 10-High fault tolerant & Expensive

17. Redundancy Array of Independent Disks
1

18. SSD
HDD
Cost
Highly expensive
Moderate
Speed
High boot-up speed
Low speed
Fragmentation
No
Prevails
Durability
Shock resistant
Less
Availability
Less
More providers
Size
No limitation
Limited to 1.8 inch
Noise
Not at all
Prevails

19. 
Model of networked enterprise storage where
data is stored in virtualized pools of storage
which are generally hosted by third parties.

20. PradeepRaj
By R.Pradeepraj

21. QUESTIONS ?