Hard Drive Recovery Tools

Hard Drive Recovery Tools

Category: Hard-Drives

"Hard drive recovery" usually means recovery of data stored on a hard drive. If the drive mechanism is damaged, it's usually more cost effective to replace the drive than to repair it. But if the data on a hard drive is irreplaceable, hard drive data recovery is critical. Here's how it works…


Hard Drive Data Recovery

How Does Hard Drive Recovery Work?

The good news is that data on a damaged hard drive can be recovered, usually. Even if you accidentally delete a critical file it's still there; only the operating system's record of where that data is (the file system pointer) has been erased. Data recovery software can detect and catalog erased or corrupted files, and let you save them again in the normal way.

Every operating system has a file system: a method of recording and tracking where every data file is stored on the hard drive. The file system records are stored in a file whose name varies from one operating system to another.

In fact, most operating systems can use multiple different file systems. Windows, for instance, can use FAT, FAT32, or NTFS file systems. Each type of file system has its pros and cons. But for hard drive recovery purposes, the salient point is that the file system data file can get damaged or deleted. Then you cannot access your data.

Data recovery software analyzes your hard drive byte by byte and reconstructs the file system database. This process can take a long time and is not 100 percent precise. You may have to look at the contents of some "lost" files and tell the data recovery software what to do with them.

CHKDSK is a Microsoft data recovery utility that goes all the way back to MS-DOS. If a file system is damaged, CHKDSK can piece together the records of where data files and their segments are stored on the hard drive, and untangle "cross-links" between parts of different data files that may occur in a corrupted file system. See my related article on how to run CHKDSK. Although written for Windows XP, the instructions are virtually the same for Vista and Windows 7 users.

Data Recovery Tools and Services

In a physical hardware drive crash, some sectors of a drive may suffer damage that prevents data recovery software from reading the data in the sectors. Such data is lost forever, but the majority of a file's contents can be recovered. Depending on that data, partial recovery may be better than none at all.

Third-party data recovery tools make it easy for even novice users to diagnose hard drive problems and recover as much data as possible. My related article My Hard Drive Crashed! lists some tips and power tools for data recovery. Other utilities you can try include Digital Rescue Premium, Recover My Files, Advanced Disk Recovery, Data Recovery Wizard, and Disk Doctors Windows Data Recovery.

If you can't access a hard drive's data due to physical damage of the drive mechanism, in most cases the best practical resource is to scrap the drive and restore the data from a backup to a new drive. Physical damage to a hard drive, such as a broken or bent read/write head or warped magnetic platter, can only be repaired by trained professionals. And typically, it's not worth the cost of this time-consuming, highly technical sort of repair which usually runs several hundreds or even thousands of dollars. But if your data is critical and irreplaceable, it may be worth the cost.

Why is data recovery so expensive? This type of work requires a first-class "clean room" environment, with anti-static flooring, ventilation systems, temperature and humidity controls, microscopes and other specialized equipment. Clean room engineers should have engineering or electronics degrees, and must also wear hazmat-style suits to prevent any smoke or dust particles, fingerprints, or hair from contaminating the exposed disk surfaces. In cases where the physical media is damaged due to fire or flood, engineers can force the hard drive's read head around the damaged areas areas using specialized electronic devices and software.

Have you ever sent out a hard drive to a data recovery service? Tell us about it, or post your comment or question below...

Sign up now for AskBob Updates!

Boost your Internet IQ, keep up with the latest online trends... get your FREE subscription now!


Email:



Share this article with friends!


Posted by on 7 Sep 2010


Need More Help? Try the AskBobRankin Updates Newsletter. It's Free!

Prev Article:
Cannot Connect to Wireless Router

The Top Twenty
Next Article:
Geekly Update - September 7 2010

Link to this article from your site or blog. Just copy and paste from this box:


Most recent comments on "Hard Drive Recovery Tools"

Posted by:

Paul VdB
07 Sep 2010

Sometimes it's only the motor that doesn't start. I "saved" HD's by taking 'em out, and with the cables still attached, spin/wiggle 'em horizontally like you would start an old mechanical clock. Of course when you get it spinning, make a back up IMMEDIATLY, 'cause this might not work a second time.
I also had good results with deepfreezing a broken HD. Put it in a ziplock bag and freeze it. After a few hours in the deep freezer, take it out of the bag, quickly connect it and if it works : BACKUP IMMEDIATLY !!!
Of course these methods are NOT GUARANTEED to work, but it might be worth a try...
Success !


Posted by:

Charlie
07 Sep 2010

Yes. Once had to send my hard drive to a recovery service. There was an agonizing rattle and scraping sound then the blue screen of death. Local computer person could not get the drive to work. unfortunately, the hard drive was not backed up. The cost for recovery was approximately $1200. All files were recovered! I now backup routinely.


Posted by:

Bill
08 Sep 2010

Just wanted to put a plug in for SpinRite (www.grc.com). Altho' it costs $89+, I have recovered half a dozen system HDDs on PCs (four were Dells) that expired with HDD error shortly after their 90 day or 1 yr warranty expired.

Over the past 5 yrs, I've become a "true believer" in the capabilities of SpinRite. It's definitely worth a mention in any of your articles on HDD recovery and/or repair.


Posted by:

Digital Artist
08 Sep 2010

(Assuming that life would actually go on if the entire contents of the drive were lost forever) When it is a last resort, why not invest ten bucks in a precision Torx driver set and take the drive apart yourself? I happen to have a good source of used computers and used components, I could buy a working model of the same hard drive that failed, remove the disks from the failed drive and put them in the working drive. No clean room? big deal, I only need it to work for one read, who cares about a micro-speck? I might even lose one file to the dust, although I doubt it. Even if the effort failed utterly, it would be a great experience, and imagine your pride if it succeeded.


Posted by:

Alexander
09 Sep 2010

I am thinking of HDD recovery problem in the knowledge of time before 2000 and it still works for me even today with these terabyte HDDs. “Blue screen of death” means in most of the practical cases crash of the operational system but not physical death of the device. Most of the HDD die from bad clusters located in the boot area. I don’t mean comparatively rare cases when HDD is physically dead as electronic device and recovery takes very expensive and specialized lab job.
What do I do in case of “blue screen of death” at your monitor? You could turn off the computer from wall outlet, open the tower and gently remove (unscrew and unplug HDD). There is always a map drawn on the HDD showing position (s) of small jumper (s) determining how your drive should work: as a slave (just external memory source) or as master (bootable device loading up operational system). Many HDDs are connected automatically depending on how you connect your device to the system and it should be shown on this map (in the table) too. You open your other computer or computer of your friend and plug damaged HDD as slave to the other computer getting access to the content of crashed HDD. You can get such access in the most of the cases excluding comparatively rare cases of massive damage of the boot sector. The other questions are simple and depend on software downloadable for free from Internet and basic knowledge of the MS Windows interface. I mean that you should know where is your valuable mail (location - folders) and My documents with the most frequently saved data. After the recovery you could try to reformat HDD (build new partitions with distributive of your Windows) and if the damage of your HDD is not crucial you can in many cases use such HDD as master (bootable drive) again or you could try to use it as extra space to store your files on the HDD working in slave mode. Modern HDDs are huge survivors much better than kitchen electric stove. :)


Posted by:

Daniel
11 Sep 2010

I also used spinrite and it recovered almost all the problematic HD, I used it in my friends HD, cause mine are backuped daily and some files are even backuped hourly.


Posted by:

parasbhanot
12 Sep 2010

i don't think recovery softwares can recover video files . i have tried my recovery software but they always give me corrupted video files even " divxfix++" cannot repair recovered video file .


Posted by:

SarahL
15 Sep 2010

If you have the time, Scott Moulton has a series of videos on YouTube that cover this topic. *Very* interesting, and informative.

http://www.youtube.com/user/SuperFlyFlippingA


Posted by:

bob vance
15 Sep 2010

ditto spinrite. it actually fixes bad spots on the disk. I've recovered many disks with it and run it yearly as proactive prevention. $89, but it's yours to use anywhere anytime as often as desired. some of the best money i've ever spent on software.


Posted by:

marius
08 Feb 2011

Hello Mr. Rankin!

I'm in great trouble and I need your HELP badly sir. Here's the story. My boss asked me to back up all the files on Drive C to Drive D, then I thought it would take long before its done. So I've decided to make a Clone of drive C: using another software. Then after a few minutes its done. I looked into drive D: for my old files and I was shocked because my files were gone! What exactly happened back there??? I'm in deep trouble and might get fired. Save me please Mr. Rankin. How can I restore the Files that accidentally deleted? Is there any way I can get them back?? thanks. I'm hoping for your reply sir. Thanks.

EDITOR'S NOTE: These may help:

http://askbobrankin.com/recover_deleted_files.html

http://askbobrankin.com/recover_deleted_files_free.html


Post your Comments, Questions or Suggestions

*     *     (* = Required field)

    (Your email address will not be published)
(you may use HTML tags for style)

YES... spelling, punctuation, grammar and proper use of UPPER/lower case are important! And please limit your remarks to 3-4 paragraphs. If you want to see your comment posted, pay attention to these items.

All comments are previewed, and may be edited before posting.

NOTE: Please, post comments on this article ONLY.
If you want to ask a question click here.


Free Tech Support -- Ask Bob Rankin
RSS   Add to My Yahoo!   Feedburner Feed
Subscribe to AskBobRankin Updates: Free Newsletter
Copyright © 2005 - Bob Rankin - All Rights Reserved
Privacy Policy -- See my profile on Google.


Article information: AskBobRankin -- Hard Drive Recovery Tools (Posted: 7 Sep 2010)
Source: http://askbobrankin.com/hard_drive_recovery_tools.html
Copyright © 2005 - Bob Rankin - All Rights Reserved

 
Free
Newsletter
Get the FREE  "AskBob Updates" newsletter!       Email:    (Details)