Online Data Storage and Magnetic Tape

1. Online Data Storage and Magnetic Tape Betsy Chacko Assistant Professor Department of Computer Applications St. Mary’s College Thrissur Secondary Storage Devices,BetsyChacko,St.Mary's College, Thrissur

2. What does Online Data Storage mean? Online data storage refers to the practice of storing electronic data with a third party service accessed via the Internet. • virtual storage approach • alternative to traditional local storage (such as disk or tape drives) • portable storage (such as optical media or flash drives) • either a cloud service component or used with other options not requiring on-site data backup Online Data Storage, Betsy Chacko,St.Mary's College, Thrissur

3. What is cloud? Cloud refers to software that runs on a remote network of servers, as opposed to localized on a computer. private clouds, owned and used by a single company or household public clouds, usually sold as a service. both private and public clouds let you access the same software and information from any computer authorized to do so. Essential feature: Extension of the physical storage capability of our devices Sync and Share Online Data Storage, Betsy Chacko,St.Mary's College, Thrissur

4. Cloud Storage Solutions There are a number of free cloud storage options available these days. These cloud storage are easy to use provide free storage space up to 50GB. can be used for personal as well as business storage. Online Data Storage, Betsy Chacko,St.Mary's College, Thrissur

5. Cloud Storage Solutions • Google Drive • Media Fire • Sync.com • Mega • Dropbox • pCloud • OneDrive • iCloud • NextCloud Online Data Storage, Betsy Chacko,St.Mary's College, Thrissur

6. 1. Google Drive • we use a file, store on the web,sync it in our computers. • lets the users store their personal stuff in a personal way • Google free cloud storage provides with an excellent free storage of 15GB and is one of the best cloud storage. • The Google Drive offline services help its users to view all the files and photos that are saved online even when they have a bad network service. • Scanning documents have now become much easier by just taking a snap of the document and the rest is done by the drive like storing them in PDF form. • Google free cloud storage is considered the best which is integrated with all other Google services. Online Data Storage, Betsy Chacko,St.Mary's College, Thrissur

7. 2. Media Fire • Easy to use • Best free cloud storage used for storing documents • and photos online. The initial free storage -10 GB, • can be up to 50 GB • Media fire has made possible uploading multiple files • at once from any browser • Organizing files in the file manager of Media Fire • have become easier • Ease our search Online Data Storage, Betsy Chacko,St.Mary's College, Thrissur

8. 3.Sync.com • Sync.com provides a free storage of about 5GB. • Easy to back up files • best feature of the Sync.com is the restoring of deleted files and thereby stops users from regretting for mysteriously lost important documents. • Get free space by recommending Sync to others. • The Sync Vault is a feature which helps the users to save files and documents in a special storage space known as Vault Online Data Storage, Betsy Chacko,St.Mary's College, Thrissur

9. 4. Mega • one of the popular free cloud storage available • great storage space which is much similar to the dropbox storage • 50GB of free space is available for the Mega cloud storage users. • Mega cloud storage helps users to download multiple files in the zip file uploading files through the mobile app is also possible. • Provides many security features Online Data Storage, Betsy Chacko,St.Mary's College, Thrissur

10. 5. Dropbox • latest free cloud storage compared to all other cloud storages because of its great back up features. • Any type of small and large powerpoint presentations, photos, videos or maybe even other large CAD files can be safely kept in the Dropbox. • Dropbox provides the users with easy sync features that help to access the files and documents to the Dropbox from any device. • a user can protect all the files and documents in a lost device by clearing the documents from the device with the remote wipe feature that it provides. • Dropbox free storage offers a good storage space (2GB) that is free but in case of users are in need of more space, there are many plans that can help them to get the desired storage of their choice. Online Data Storage, Betsy Chacko,St.Mary's College, Thrissur

11. 6. pCloud • provides 2TB storage and • its unlimited remote upload traffic feature makes it unique. • It offers 10GB of free storage space to its basic accounts. • Resizing pictures on the go without the help of software has become much easier with my.pCloud • files can be archived with the create archive option that it provides. The pCloud drive has an option that helps the users automatically lock the crypto folders each and every time they log off from the device. Online Data Storage, Betsy Chacko,St.Mary's College, Thrissur

12. 7. OneDrive • Keeping documents and files within reach has become possible with the top free cloud storage solutions such as Microsoft OneDrive. • Signing up with Microsoft can help users in keeping everything in one place. • provided 10GB of free space to the users • It can be accessed from any device at any point of time but is pre-installed in windows. Online Data Storage, Betsy Chacko,St.Mary's College, Thrissur

13. 8. iCloud The Apple iCloud is the best free cloud storage for Apple users. provides the users with 5GB of free storage. All documents and files can be stored safely and it is easy to use. The users of Apple iCloud can share photos and videos with ease Organizing files and folders has become easy with Apple iCloud Apple iCloud helps in sending messages and automatically and saves them Online Data Storage, Betsy Chacko,St.Mary's College, Thrissur

14. 9. NextCloud • helps in protecting data • excellent backup feature which helps the users to keep track of all the data even after the device is lost. • The Next Cloud provides a two-factor authentication to its users which in turn, provides an extra protection towards account usage. Online Data Storage, Betsy Chacko,St.Mary's College, Thrissur

15. Advantages • Data storage saving • World Wide accessibility • Data safety: • Security • Easy sharing • Data recovery • Automatic backup Online Data Storage, Betsy Chacko,St.Mary's College, Thrissur

16. Disadvantages • Improper handing can cause trouble: createcomplex passwords , avoid storage in personal devices • Choose trustworthy source to avoid any hazard • Need Internet connection : If no internet connection then no access of data even though it is safely stored online. Online Data Storage, Betsy Chacko,St.Mary's College, Thrissur

17. References : https://www.whizlabs.com/blog/best-free-cloud-storage/ https://www.webopedia.com/TERM/O/online_data_storage.html https://beginnersbook.com/2013/01/best-online-data-storage/ https://www.cloudwards.net/online-storage-vs-online-backup-whats-the-difference/ Online Data Storage, Betsy Chacko,St.Mary's College, Thrissur

18. Online Data Storage and Magnetic Tape Secondary Storage Devices,BetsyChacko,St.Mary's College, Thrissur

19. Contents • Primary Storage Vs. Secondary Storage • Sequential and Direct Access Devices • Magnetic Tapes • Storage Organization • Type and Capacity • Advantages • Magnetic Tape : Today • New Technologies Introduced • Future of Data Storage • Conclusion Secondary Storage Devices,BetsyChacko,St.Mary's College, Thrissur

20. Primary Storage Vs. Secondary Storage Primary Memory • Mandatory • Volatile • Expensive • Limited Capacity Secondary Memory (External Memory or Auxiliary Storage) • Huge volume • Non Volatile • Less Expensive Contents Secondary Storage Devices,BetsyChacko,St.Mary's College, Thrissur

21. Sequential and Direct Access Devices Sequential • Sequencing through locations • Access time varies according to location • Eg : Magnetic Tape Random • Direct access storage device • Access any location at random • Approximately equal access time • Eg: Magnetic Disk, Optical Disk Contents Secondary Storage Devices,BetsyChacko,St.Mary's College, Thrissur

22. Magnetic Tapes • Sequential • Popular for large data sets • Plastic ribbon usually half inch or quarter inch wide • and 50 to 2400 feet long • Surface coated with iron oxide or chromium dioxide • Record data by magnetization • Tape ribbin stores in reels • Can store and erase data • Can read the data several times Contents Secondary Storage Devices,BetsyChacko,St.Mary's College, Thrissur

23. Magnetic Tapes • Continuous medium • Record data serially • No addressing Inter Record Gaps – Separates recors by blank spaces Inter Block Gaps – Separates blocks by blank spaces Contents Secondary Storage Devices,BetsyChacko,St.Mary's College, Thrissur

24. Storage Organization Contents Secondary Storage Devices,BetsyChacko,St.Mary's College, Thrissur

25. Magnetic Tape: Type and Capacity Contents Secondary Storage Devices,BetsyChacko,St.Mary's College, Thrissur

26. Advantages Contents Secondary Storage Devices,BetsyChacko,St.Mary's College, Thrissur

27. Magnetic Tape : Today • Modern magnetic tape is packaged in cartridges and cassettes • Single palm-sized cartridge • Sony Develops Magnetic Tape Storage Technology with the • Industry's Highest Recording Areal Density of 201 Gb/in2 • 20x Greater Density Than Conventional Technologyfor Supporting • High-Capacity 330 TB Recording Contents Secondary Storage Devices,BetsyChacko,St.Mary's College, Thrissur

28. Technology Introduced • New technologies used for a dramatic increase in areal density • 1. an improved built-in lubricant layer • a new type of magnetic layer. • 2. sputter deposition • sputtering—it produces magnetic tape with magnetic grains that are just a few nanometres across, rather than tens or hundreds of nanometres in the case of commercially available tape. • 3. Innovative signal-processing algorithms for the data channel • based on noise-predictive detection principles, which enable reliable operation at a linear density of 818,000 bits per inch with an ultra- narrow 48nm wide tunneling magneto- resistive (TMR) reader. Contents Secondary Storage Devices,BetsyChacko,St.Mary's College, Thrissur

29. Technology Introduced cont. 4. A set of advanced servo control technologies that when combined enable head positioning with an accuracy of better than 7 nanometers. This combined with a 48nm wide (TMR) hard disk drive read head enables a track density of 246,200 tracks per inch, a 13-fold increase over a state of the art TS1155 drive. 5. A novel low friction tape head technology that permits the use of very smooth tape media Contents Secondary Storage Devices,BetsyChacko,St.Mary's College, Thrissur

30. Magnetic Tape : Today Secondary Storage Devices,BetsyChacko,St.Mary's College, Thrissur

31. Future of Data Storage Magnetic Tape Why? Disk drives are reaching their limits, but magnetic tape just gets better and better........... Contents Secondary Storage Devices, Betsy Chacko, St. Mary's College, Thrissur

32. Conclusion Tape storage is currently the most secure, energy efficient and cost-effective solution for storing enormous amounts of back-up and archival data, as well as for new applications such as Big Data and cloud computing. Contents Secondary Storage Devices,BetsyChacko,St.Mary's College, Thrissur

33. References Computer Fundamentals: Pradeep K. Sinha & PritiSinha https://arstechnica.com/information-technology https://www.amazon.com Contents Secondary Storage Devices,BetsyChacko,St.Mary's College, Thrissur

34. Thank You betsy.chacko@smctsr.ac.in Secondary Storage Devices,BetsyChacko,St.Mary's College, Thrissur