The document discusses various types of storage devices including HDDs, SSDs, and different storage technologies such as magnetic, optical, and flash storage. It highlights important features and trends, including the advantages and disadvantages of each type, as well as RAID configurations and advancements in cloud storage. The information indicates shifts towards virtualization and increased durability in storage solutions.

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 ?