PPT on SECONDRY MEMORY BY ASHWIN
- 1. SECONDARY MEMORY A PRESENTATION BY ASHWIN
- 2. SOME EXAMPLES OF SECONDARY MEMORY ARE 1) EXTERNAL HARDISKS 2) PENDRIVES (USB) 3) CD (COMPACT DISK) 4) DVD ( DIGITAL VERSATILE DISK ) , ( DIGITAL VIDEO DISK) 5) DATACARD 6) BLUE RAY DISK (BD) 7) CLOUD STORAGE
- 3. MORE ON EXTERNAL HARDISK :- AN EXTERNAL HARD DRIVE IS A PORTABLE STORAGE DEVICE THAT CAN BE ATTACHED TO A COMPUTER OR LAPTOP THROUGH A USB OR FIREWIRE CONNECTION OR WIRELESSLY. EXTERNAL HARD DRIVES TYPICALLY HAVE HIGH STORAGE CAPACITIES AND ARE OFTEN USED TO BACK UP COMPUTERS OR SERVE AS A NETWORK DRIVE EXTERNAL HARDISKS CAN STORE UPTO 1 TB TO 16 TB
- 4. A USB FLASH DRIVE IS A DATA STORAGE DEVICE THAT INCLUDES FLASH MEMORY WITH AN INTEGRATED USB INTERFACE. IT IS TYPICALLY REMOVABLE, REWRITABLE AND MUCH SMALLER THAN AN OPTICAL DISC. MOST WEIGH LESS THAN 30 G. IT CAN STORE DATA UP TO DATA 1 TB MORE ABOUT PENDRIVES :-
- 5. MORE ABOUT CD ( COMPACT DISK ) :- COMPACT DISC (CD) IS A DIGITAL OPTICAL DISC DATA STORAGE FORMAT THAT WAS CO- DEVELOPED BY PHILIPS AND SONY AND RELEASED IN 1982. THE FORMAT WAS ORIGINALLY DEVELOPED TO STORE AND PLAY ONLY SOUND RECORDINGS (CD- DA) BUT WAS LATER ADAPTED FOR STORAGE OF DATA (CD-ROM). IT CAN HAVE UPTO SAPE 600 TO 700 MB
- 6. MORE ABOUT DVD ( DIGITAL VERSATILE DISK ) DVD IS A DIGITAL OPTICAL DISC STORAGE FORMAT INVENTED AND DEVELOPED IN 1995 AND RELEASED IN LATE 1996. THE MEDIUM CAN STORE ANY KIND OF DIGITAL DATA AND IS WIDELY USED FOR SOFTWARE AND OTHER COMPUTER FILES AS WELL AS VIDEO PROGRAMS WATCHED USING DVD PLAYERS. IT CAN STORE UPTO 4.7 GB TO 17 GB
- 7. MORE ABOUT DATA CARD A DATA CARD IS ANY REMOVABLE COMPUTER COMPONENT, APPROXIMATELY THE SIZE OF A CREDIT CARD, THAT CONTAINS DATA, OR THAT CONTAINS NONVOLATILE MEMORY TO WHICH DATA CAN BE WRITTEN AND FROM WHICH DATA CAN BE RECOVERED. THE TERM IS A SYNONYM FOR SMART CARD. IT CAN STORE UPTO 256 GB.
- 8. MORE ABOUT BLUE RAY DISK BLU-RAY DISC (BD), OFTEN KNOWN SIMPLY AS BLU-RAY, IS A DIGITAL OPTICAL DISC DATA STORAGE FORMAT DESIGNED TO SUPERSEDE THE DVD FORMAT, CAPABLE OF STORING SEVERAL HOURS OF VIDEO IN HIGH- DEFINITION (HDTV 720P AND 1080P). IT CAN STORE UPTO 50 GB
- 9. MORE ABOUT CLOUD STORAGE CLOUD STORAGE IS A MODEL OF COMPUTER DATA STORAGE IN WHICH THE DIGITAL DATA IS STORED IN LOGICAL POOLS. THE PHYSICAL STORAGE SPANS MULTIPLE SERVERS, AND THE PHYSICAL ENVIRONMENT IS TYPICALLY OWNED AND MANAGED BY A HOSTING COMPANY. IT CAN STORE PHOTOS , VIDEOS AND ETC