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I know that though as time goes by, there are still many user may meet this question like this post said: how to recover lost files if the computer hard drive is crashed?
Though it is difficult to do that, but in fact that data recovery is still be possible to perform. But the first thing users need to do is going to fix the hard drive first because I believe it is impossible to do any operation on a crashed drive.
Maybe you also know that fix a hard drive sometimes mean format it-all the files are gone. Is it true? Actually no.
Let's take formatting as an example. When you format a hard drive, it seems that all the files are gone you cannot find them anywhere. Actually, what the operating system does is only going to delete the catalog and free up the space of the files so that there is enough space for you to store new files into your hard drive later. At this moment, you still have chance to recover these files no matter you format your hard drive or delete files from your hard drive.
But one thing you need to pay attention to is that if you put any new files into your hard drive, these new files will occupy the space of the "deleted files"-this is the so-called data overwritten situation. Once this happens, you will lose the chance to recover the files.
For brevity, I only write some important points you may need to know before data recovery. For more details you can check this post: http://bit.ly/1ts4Enu
What I do is remove the drive and install it in a drive box, so I can connect it to my PC as an external device. I then try to access it as I would any other external hard drive, memory card, etc.
If the drive has crashed for mechanical reasons - spindle motor burned up, for example - there is little to be done. If you physically cannot get the disks to spin, you will not be able to read them. You can then send the drive to a recovery center. Expensive, but only you can determine how much your specific data is worth.
If the drive spins for a short time then stops, you can try cooling it down. Put it in a plastic bag, place it in the freezer for an hour, then try the external drive connection method. Be quick about it! Cooling it down will usually extend the run time by several minutes. Try to access and copy your data before the drive stops again.
There are a few things that you need to keep in mind when you lose your data or your hard drive crashes abruptly:
1. Do not ue it anymore
2. Do not try to read/write data from it
3. Do not be an engineer yourself and try opening up your hard disk after following videos on you tube or so..
If the data is worth recovering then it is deinitely not worth of taking risks which will make your data gone forever..
The first option is to try recovering your data with any well reputed data recovery software.
The second and the ultimate option is to consult any data recovery expert for data recovery.. This option can get a bit expensive but if your data is important, then money is bever a problem..
If you did not put anything new after you lose your files, you chances of data recovery is still there. Why?
When a file is deleted, it seems you just lose the file forever. Actually, the file content still exists on the hard disk, Mac system simply marks the hard drive space as being available for use so that you can write new files. If you manage to start an undelete process before Windows uses that part of the hard drive to write a new file, all you have to do is set that flag back to “on” and you get the file.
Obviously, the sooner you try to recover a deleted file, the more successful you’ll be. But stop a moment and think about the other things that could cause this part of the hard drive to be overwritten. If your hard drive is pretty full, the odds are much greater that Windows will grab your precious unallocated space for its next write. Or, if you defrag the hard drive, you run the risk of unused parts of the drive being overwritten! (This also means that if you are running silent background defrags services like Diskeeper, or if you have defragged utilities scheduled to defrag automatically, you might get blindsided-lose your chance at data recovery-if you don’t halt them until you have your deleted file recovered.
If you are facing the data loss due to crashed Hard Disk and getting bad sectors on your Hard Drive but still you are able to use your hard Disk. It means There are some space are available in your Hard Drive for operations. But you are not getting and not able to retrieve your previous data after the crashing the HD. Then there is a suggestion for you to not perform any operation on that HD and Use Data Recovery software as per your requirements. If you not able to access your HD the unplug it from the System and mount it to another system and access it with the help of Data recovery software.
Use of Recover Data for Windows software doesn't requires any technical expertise and its provides friendly GUI(Graphical User Interface).
Firstly, if you want to recover data from crashed hard drive, you have to stop using hard drive after crashing.
Secondly, crashed data in the hard drive may still be in the memory sectors,crash happens when some sectors suffer from error or other wrongs, and some rescue solutions can fix the bad sectors.
Thirdly, when crash happensto hard drive and data is lost from hard drive, you can try to use recovery tool to recover data from crashed hard drive.
Even if the hard drive was crashed, it is possible to recover data from it. As long as the data is nor overwritten. Generally speaking, crash in a hard dirve or a storage device result from partition error, you may can fix them by formatting, but you will lost all the data. Thus, you have to recover the data first. I has a similar experience before, my gf' s laptop had a hard drive error and counld not boot normally, and I have to formate the hard drive to reinstall the system, but it was at the price of data loss. After system reinstalling, I googled a software to recover data from the laptop's hard drive, you can get the version without paying to see whether you data are still there, know more here: http://memory-card-data-reovery.blogspot.com/2013/03/hard-drive-data-rec...
The lesson every computer user learns the hard way is to back up their data. It is not a matter of whether a hard drive will fail, but when. 20 years ago, there were several tools that were quite helpful in recovering lost data from Windows and Macintosh-formatted hard drives, but as the drives have gotten larger and our operating systems have become more complex, the number of available data recovery tools and the quality of those tools has decreased considerably.
The first step to take if your hard drive fails is to shut down your machine and try not to panic. Keeping your emotions in check is important to not making mistakes throughout the recovery process.
Commercial programs like Iolo Search and Recover, PC Inspector, and HigherGround Hard Drive Mechanic can help you to recover your hard drive, provided you can mount the failed drive in another computer. This usually requires removing the failed hard drive from your computer and attaching it to a USB-based external drive kit (available for desktop and notebook drives with either ATA or SATA connectors). You’ll want to insure that the external drive kit is USB 2.0 compatible, or it can take a large amount of time to recover your data, because USB 1.0 is much slower. You do not need to be an expert to run these tools, but it doesn’t hurt to employ an IT professional for jobs such as these because they’re often able to breeze through the data recovery process without spending a great deal of emotional energy.