Data communication and networking(finnal with animations)2

DATA COMMUNICATION AND NETWORKING

Presentation

GROUP MEMBERSName Roll.no

Humayun Sikander 130

Ghulam Murtaza 147

Muhammad Ans 128

Submit to Sir Neimat Ullah  

Data Recovery Software 

OBJECTIVES

What is data recovery. Data recovery process Data recovery in modern time Inner working of data recovery Data recovery of physical issues Chances of data recovery How to use data recovery Top 6 software Conclusion  

Data recoveryIntroduction to data recovery Data recovery is the process of recovering data from hard drive, removable disks or other type of storage media. When our data get damage then we cannot access it directly so we use recovery software for accessing our data.

• Data lose causes We can loss our data cause of deleting files accidentally, cause of viruses , cause of physical problem of electronic media, computer crime and losing our password and emails etc. 

Data recovery process Data recovery is very simple in different cases but some times we need to be the detailed work for recovering the data. There are some steps to accessing our lost data.• Evaluate In this step it is analyze that how deeply our data is damaged and how many chances are there to recover our data.• Estimate How much work will need to recover the data and how many cost will required to us for recovering the data.• Mirror It is seen that our data is recoverable and then we use software for mirroring or copying the lost data.• Repair Repair any physical damage that is preventing to access our data. 

• Recover Recover the data through software.• Analyze Analyze the recovered data that it is intact and useable or not and then provide the report.• Return Return the recovered data on the safe media that you have chosen.Data recovery in modern time In modern time we can recover many of the storage devices even we can recover servers that the people use in their business. We can recover emails, passwords, Workstations and the important files. Many companies work on data recovery it is very worst field . 

Inner working of the data recovery

• Files after deletion When you delete any file then it goes to the recycle bin.• After empting the recycle bin When you make empty your recycle bin after deleting file then your deleted file goes very less accessible but still remains in your computer.• Very less accessible file When you make empty your recycle bin then the file system removes the link through which you access you file and file system makes then space for new files but your deleted file still remain in the computer.• Permanent loose your file Your operating system has the authority of permanently remove your deleted file for providing space to the new files. 

• Overwriting files If you have delete a file and after deleting file you install a new file in your computer if your operating system install you new files on the previous deleted files it is called the overwriting. If your operating system overwrite the file there are very less chances to recover your file.

• Quick recover If your file is accidentally deleted and you want to recover that file you need to recover that file first if you don’t recover your file at the time then there are many chances of overwriting your file.

• Data recovery of physical issues When the problem is with inner component of the hard drive such as controller arm, reader heads or motor then the repair is more complicated.

• Problem with PCB If the problem occur with the PCB the recovery specialist can repair or replace the board with the same model.

• Providing data after recovery You can return data to the client in different ways. Replacing data to a DVD, CD, with USB’s and external hard disk or upload on a server from where the client download his data.

Chances of data recovery Chances of data recovery depends on the actual causes of data loss and further user’s actions.

• Data loss cause of deletion file deleted may still remain in hard disk. If any software or new file is install in your computer then your data can permanently loss. 

• Easy to recover Deletion file system algorithm depends on file recovery after deleting file. In Windows NTFS file system recovery chances are good because if the file descriptor remains on the disk you can recover file easily.In NTFS, UFS, and BSD we can recover the file easily because these file systems don’t destroy the information permanently. • Fat Fat is the file system in which the information of file fragmentation destroys but the name, size and type of the file remains safe on disk.• Recover data file system format After file system formatted the part of information destroyed due to overwriting the new files of new file system now the chances of recovery depend on the original and new file system. 

• No chance of recovery If our previous file system is FAT and new file system is also FAT then there is no chance to recover the data. Some time the recovery chances are good if the file system is formatted with the same file system like (NTFS). Some time there is no chance to recover the data like (FAT over FAT).

• Full access to the data Most of our file system provides the facility of recovering data successfully because the information still remain about files, directory records and file name.

• Data lost Recovery after file system format our data can be recovery but not fully accurate . 

Recovery after file system damage In this type of data lost we apply recovery software as we apply in the case of file system formatted. Data recovery depends on the damage of file system in which we lost our data like file , folders file name and file location etc.

Partition information In this type of recovery the software scan the whole disk and if the file system is not damaged then we can recovery the data in accurate form but if the file system is damaged itself then the data cannot recover.

Hardware recovery This process is very dangerous for your data if you want to recover your data from a failed hard disk then you contact with a data recovery company because if you recover data on your own then your data can be lost permanently. • RAID system Through RAID (Redundancy array inexpensive disk)system you can recover your data. RAID failure occur your file system damage. If your file system is intact then you can recover the data.

Recovery of overwritten dataIt is simply impossible to recover the data from the disk when it is overwritten.

How to use Recuva 

Top six Software

• Stellar Phoenix 5 - Cost $49.95 • Recuva • R-Studio Windows – Cost $79.99 • Data Rescue PC 3 - Cost $49.00

• Recover My Files 5.2 - 69.95

• GetDataBack 4.2 - $69.00 

Conclusion Data recovery software is definitely useful in the hour of need and data recovery services prove themselves when the software is unable to get there data back safely. Without data recovery software it is very difficult for people and companies who loss their important data which they need in future.  

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