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HDD External Hard Drive Corrupted and Unreadable

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August 6, 2012 1:27:50 PM


HDD External Hard Drive Corrupted and Unreadable, What should I do?
a b G Storage
August 6, 2012 5:52:03 PM

You can try using a couple of recovery programs on it, but if those fails then you need to make a choice between writing off the data on the drive or breaking out the wallet and sending it in for recovery services.

If you don't want to spend a few grand on recovery services, I would at least try formatting the drive to see if the hardware is still good, the filesystem just became corrupted. Worth a shot before chucking it.
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September 16, 2012 8:14:27 AM

IZUKANJI said:
HDD External Hard Drive Corrupted and Unreadable, What should I do?


If you are under Windows operating system, go to Start > All Programs > Accessories, right-click on Command Prompt and select Run as administrator. In cmd window that appears type this:
chkdsk x: /f
(where x = drive letter associated with your external hard drive, and before x: and after x: there is a space)
and press Enter.
Command chkdsk (check disk) will correct errors and your external hard drive will be accessible again.
m
0
l
Related resources
September 17, 2012 9:25:01 AM

Quote:
if there are some important data, you'd better apply a data recovery software to help you. you could choose iCare Data Recovery Free . it is not only free, it is also professional and efficient in recovering data. you could download it in this link:
http://www.freenew.net/windows/icare-data-recovery-soft...


It is not better to apply first a data recovery software, because that software cannot access inaccessible disk. Prior to use that software it's needed to format hard drive, which means losing data. So, data recovery software is the last option. Really, better is to perform chkdsk as I described above. After all, data recovery software cannot make a miracle, and many of files on formatted disk can be permanently lost, depending on the file format and the ability of data recovery software. Such the best professional software – which is not freeware – could recover from 180 to 200 file formats only, with no 100 percent guarantee to fully recover all the files. E.g. ParetoLogic Data Recovery Pro, or EASEUS Data Recovery Wizard, can recover almost any file. Note: "almost". What about those files that cannont be recovered? That's why data recovery software is the last step. Better is the first step would be chkdsk x: /f and second step chkdsk x: /r (fully correct files, clusters, and sectors on a inaccessible drive). Formatting disk and later recovery data is really the last chance.
m
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April 21, 2013 1:17:18 AM

I would like to thank you themrvladek for your kind support and valuable information it works now




m
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July 30, 2013 1:27:20 PM

thank u a lot themrvladek have been looking around the net for a solution and after a 3 hour search,i applied ur solution and it worked great for me ,thank you thank you thank you
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August 21, 2013 12:17:18 AM

themrvladek said:
IZUKANJI said:
HDD External Hard Drive Corrupted and Unreadable, What should I do?


If you are under Windows operating system, go to Start > All Programs > Accessories, right-click on Command Prompt and select Run as administrator. In cmd window that appears type this:
chkdsk x: /f
(where x = drive letter associated with your external hard drive, and before x: and after x: there is a space)
and press Enter.
Command chkdsk (check disk) will correct errors and your external hard drive will be accessible again.


m
0
l
August 21, 2013 12:19:42 AM

I had 1000 movies which I thought I had lost on my Western Digital external hard drive, Thank you a 1000 times your solution worked and I have all my movies back. Thank you, Thank you 1000 times over.
m
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August 24, 2013 9:25:04 AM

Namik Akbulut said:
themrvladek said:
IZUKANJI said:
HDD External Hard Drive Corrupted and Unreadable, What should I do?


If you are under Windows operating system, go to Start > All Programs > Accessories, right-click on Command Prompt and select Run as administrator. In cmd window that appears type this:
chkdsk x: /f
(where x = drive letter associated with your external hard drive, and before x: and after x: there is a space)
and press Enter.
Command chkdsk (check disk) will correct errors and your external hard drive will be accessible again.




m
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l
August 24, 2013 9:26:01 AM

Thank u very much answer.chkdsk just repaired my hdd.
m
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November 16, 2013 4:59:07 PM

themrvladek said:
IZUKANJI said:
HDD External Hard Drive Corrupted and Unreadable, What should I do?


If you are under Windows operating system, go to Start > All Programs > Accessories, right-click on Command Prompt and select Run as administrator. In cmd window that appears type this:
chkdsk x: /f
(where x = drive letter associated with your external hard drive, and before x: and after x: there is a space)
and press Enter.
Command chkdsk (check disk) will correct errors and your external hard drive will be accessible again.


m
0
l
November 16, 2013 5:00:01 PM

Best advice ever, recovered every thing is there a reason this happened in the first place?
m
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l
December 8, 2013 6:14:47 PM

themrvladek said:
IZUKANJI said:
HDD External Hard Drive Corrupted and Unreadable, What should I do?


If you are under Windows operating system, go to Start > All Programs > Accessories, right-click on Command Prompt and select Run as administrator. In cmd window that appears type this:
chkdsk x: /f
(where x = drive letter associated with your external hard drive, and before x: and after x: there is a space)
and press Enter.
Command chkdsk (check disk) will correct errors and your external hard drive will be accessible again.


Thanks a million, themrvladek, I was considering getting my device repaired but your advice worked perfectly. Thank you so much!!!
m
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l
December 8, 2013 11:18:53 PM

sorota1 said:
Best advice ever, recovered every thing is there a reason this happened in the first place?


About reason(s):
Hard drive failure occurs when the hard disk drive fails to function properly and can no longer be accessed. Hard disk drives fail for a number of reasons, ranging from hardware life expectancy to human error. There are four basic types of hard drive failures. 1. Software or firmware damage may cause the disk to become unreadable, resulting in the inability to interact properly with the computer. 2. Problems with the controller board on the hard disk may result in electronic failure. 3. Mechanical failure can occur when components on the disk become faulty. 4. Logical corruption may occur when there is a problem with the information on the disk.
So, if the hard drive becomes corrupted and unreadable – as I have already written – the first step would be to perform chkdsk x: /f and second step chkdsk x: /r (fully correct files, clusters, and sectors on a inaccessible drive) where x: = HDD letter (E: or F: etc.)
m
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l
December 19, 2013 8:08:53 PM

themrvladek said:
sorota1 said:
Best advice ever, recovered every thing is there a reason this happened in the first place?


About reason(s):
Hard drive failure occurs when the hard disk drive fails to function properly and can no longer be accessed. Hard disk drives fail for a number of reasons, ranging from hardware life expectancy to human error. There are four basic types of hard drive failures. 1. Software or firmware damage may cause the disk to become unreadable, resulting in the inability to interact properly with the computer. 2. Problems with the controller board on the hard disk may result in electronic failure. 3. Mechanical failure can occur when components on the disk become faulty. 4. Logical corruption may occur when there is a problem with the information on the disk.
So, if the hard drive becomes corrupted and unreadable – as I have already written – the first step would be to perform chkdsk x: /f and second step chkdsk x: /r (fully correct files, clusters, and sectors on a inaccessible drive) where x: = HDD letter (E: or F: etc.)


Hi i have tried the chkdsk and it just says access denied. anything else i can try before i take it to a computer shop. Im having the same file is corrupted or unreadable message.
m
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l
December 20, 2013 1:10:09 AM

chellie said:
themrvladek said:
sorota1 said:
Best advice ever, recovered every thing is there a reason this happened in the first place?


About reason(s):
Hard drive failure occurs when the hard disk drive fails to function properly and can no longer be accessed. Hard disk drives fail for a number of reasons, ranging from hardware life expectancy to human error. There are four basic types of hard drive failures. 1. Software or firmware damage may cause the disk to become unreadable, resulting in the inability to interact properly with the computer. 2. Problems with the controller board on the hard disk may result in electronic failure. 3. Mechanical failure can occur when components on the disk become faulty. 4. Logical corruption may occur when there is a problem with the information on the disk.
So, if the hard drive becomes corrupted and unreadable – as I have already written – the first step would be to perform chkdsk x: /f and second step chkdsk x: /r (fully correct files, clusters, and sectors on a inaccessible drive) where x: = HDD letter (E: or F: etc.)


Hi i have tried the chkdsk and it just says access denied. anything else i can try before i take it to a computer shop. Im having the same file is corrupted or unreadable message.


Yes, there is something else; it seems to me all you have to do is to get permission (administrator privileges) to perform chkdsk.
The first method:
Click Start and in the Search field type: cmd and then right-click the Command Prompt icon (cmd.exe) and click Run as administrator, and then type: chkdsk <external HDD letter:> /f (press Enter).
The other way to get permission to do chkdsk is by enabling the 'super admin account':
Click Start and in the Search field type: cmd and then right-click the Command Prompt icon (cmd.exe) and click Run as administrator, and type: net user administrator /active:yes (press Enter). The system should return you with the following message: The command completed successfully . Exit the Command Prompt. Click the Start icon, and log off from the current account and in the Account window you should now see the Administrator account. Log in Administrator, open Command Prompt, and perform chkdsk <external HDD letter:> /f (press Enter)
If you want to turn off the Admin account, in Command Prompt type: net user administrator /active:no (press Enter).
m
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l
December 28, 2013 3:20:51 AM

themrvladek said:
sorota1 said:
Best advice ever, recovered every thing is there a reason this happened in the first place?


About reason(s):
Hard drive failure occurs when the hard disk drive fails to function properly and can no longer be accessed. Hard disk drives fail for a number of reasons, ranging from hardware life expectancy to human error. There are four basic types of hard drive failures. 1. Software or firmware damage may cause the disk to become unreadable, resulting in the inability to interact properly with the computer. 2. Problems with the controller board on the hard disk may result in electronic failure. 3. Mechanical failure can occur when components on the disk become faulty. 4. Logical corruption may occur when there is a problem with the information on the disk.
So, if the hard drive becomes corrupted and unreadable – as I have already written – the first step would be to perform chkdsk x: /f and second step chkdsk x: /r (fully correct files, clusters, and sectors on a inaccessible drive) where x: = HDD letter (E: or F: etc.)


m
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l
December 28, 2013 3:33:31 AM

I must say...AWESOME!!! I "had" the same problem - preformed as you suggested and all files are there!!! I am NO WAY computer savvy and was reluctant to try to fix my self - my son told me that the commands you listed were "dos" and would not harm anything in any way....so I tried it .... I must say that the last step took a while and I was nervous... THANK YOU SO MUCH for sharing your knowledge...years of photos of children/grandchildren SAVED!! I will spend the next few days coping the files to disks and storing them. Just a note: this happened to me after my computer updated the new version of Java (without my permission I might add)???
m
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January 7, 2014 10:50:29 AM

themrvladek said:
IZUKANJI said:
HDD External Hard Drive Corrupted and Unreadable, What should I do?


If you are under Windows operating system, go to Start > All Programs > Accessories, right-click on Command Prompt and select Run as administrator. In cmd window that appears type this:
chkdsk x: /f
(where x = drive letter associated with your external hard drive, and before x: and after x: there is a space)
and press Enter.
Command chkdsk (check disk) will correct errors and your external hard drive will be accessible again.


OMG this WORKED!!!! Thank you sooo much! I have literally spent months on trying to find a solution... Thank you! thank you thank you!!
m
0
l
February 4, 2014 2:10:51 AM

themrvladek said:
IZUKANJI said:
HDD External Hard Drive Corrupted and Unreadable, What should I do?


If you are under Windows operating system, go to Start > All Programs > Accessories, right-click on Command Prompt and select Run as administrator. In cmd window that appears type this:
chkdsk x: /f
(where x = drive letter associated with your external hard drive, and before x: and after x: there is a space)
and press Enter.
Command chkdsk (check disk) will correct errors and your external hard drive will be accessible again.


thank you! this worked. I almost had a mini heart attack when I couldn't access it from any of my devices.
m
0
l
February 15, 2014 6:52:16 AM

themrvladek said:
IZUKANJI said:
HDD External Hard Drive Corrupted and Unreadable, What should I do?


If you are under Windows operating system, go to Start > All Programs > Accessories, right-click on Command Prompt and select Run as administrator. In cmd window that appears type this:
chkdsk x: /f
(where x = drive letter associated with your external hard drive, and before x: and after x: there is a space)
and press Enter.
Command chkdsk (check disk) will correct errors and your external hard drive will be accessible again.


I am having the same trouble with my Iomega ego. But i'm on a mac...do you have any solutions for Macs?
m
0
l
April 9, 2014 3:37:02 AM

hey, i tried doing chkdsk in cmd prompt, but the error says

The type of file system is NTFS.
Unable to determine volume version and state. CHKDSK aborted.

Now what should i do.
error says

H:/ is not accessible.
The file or directory is corrupted or unreadable.
m
0
l
June 11, 2014 4:52:57 AM

themrvladek said:
It is not better to apply first a data recovery software, because that software cannot access inaccessible disk. Prior to use that software it's needed to format hard drive, which means losing data. So, data recovery software is the last option. Really, better is to perform chkdsk as I described above. After all, data recovery software cannot make a miracle, and many of files on formatted disk can be permanently lost, depending on the file format and the ability of data recovery software. Such the best professional software – which is not freeware – could recover from 180 to 200 file formats only, with no 100 percent guarantee to fully recover all the files. E.g. ParetoLogic Data Recovery Pro, or EASEUS Data Recovery Wizard, can recover almost any file. Note: "almost". What about those files that cannont be recovered? That's why data recovery software is the last step. Better is the first step would be chkdsk x: /f and second step chkdsk x: /r (fully correct files, clusters, and sectors on a inaccessible drive). Formatting disk and later recovery data is really the last chance.


Thanks a bunch themrvladek. You own the internet.
m
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l
June 18, 2014 4:50:44 AM

themrvaladek: I am a teacher and had all my work on a harddrive that today said 'corruped and unreadable' I nearly cried! I had backed up some but not all of the recent stuff. I frantically searched the web and came across your advice and it worked!!!! I am SO grateful!!!! And i have now backed up all my harddrive.
It now works fine but do you think i should use it or buy a replacement??
m
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July 4, 2014 1:24:14 AM

sir themrvladek, i already tried chkdsk x: f/ or r/ but errors says

Windows cannot recover master file table. CHKDSK aborted.

Do you know what solution about that?
m
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July 9, 2014 2:19:05 AM

It says "the type of the file system is NTFS. unable to determine volume version and state. CHKDSK aborted.

Please Help!!!
m
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l
July 11, 2014 1:47:06 AM

themrvladek said:
IZUKANJI said:
HDD External Hard Drive Corrupted and Unreadable, What should I do?


If you are under Windows operating system, go to Start > All Programs > Accessories, right-click on Command Prompt and select Run as administrator. In cmd window that appears type this:
chkdsk x: /f
(where x = drive letter associated with your external hard drive, and before x: and after x: there is a space)
and press Enter.
Command chkdsk (check disk) will correct errors and your external hard drive will be accessible again.


Thanks for saving my HDD, im not a techy person so your advise really saves me and my HDD.
m
0
l
July 11, 2014 1:50:36 AM

13645450,0,1703917 said:
sir themrvladek, i already tried chkdsk x: f/ or r/ but errors says

Windows cannot recover master file table. CHKDSK aborted.

Do you know what solution about that?[/q

I encountered the same but if you will read carefully the instructions x: is the name of your HDD so is your HDD file name is H: or G: then change x: with h: or g:
m
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July 13, 2014 10:37:10 AM

Thank you for your help. I had a similar problem. I ran the CHKDSK. After doing that I received the message stating "drive is not accessible. access is denied.". Any ideas of how to fix this problem.

Thank you
m
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l
July 16, 2014 3:36:05 AM

raisondart said:
themrvladek said:
IZUKANJI said:
HDD External Hard Drive Corrupted and Unreadable, What should I do?


If you are under Windows operating system, go to Start > All Programs > Accessories, right-click on Command Prompt and select Run as administrator. In cmd window that appears type this:
chkdsk x: /f
(where x = drive letter associated with your external hard drive, and before x: and after x: there is a space)
and press Enter.
Command chkdsk (check disk) will correct errors and your external hard drive will be accessible again.


I am having the same trouble with my Iomega ego. But i'm on a mac...do you have any solutions for Macs?


m
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l
July 16, 2014 3:41:12 AM

Dear raisondart,
Unfortunately, all my knowledge about computer operating systems is Windows, and Mac is totally unknown to me...
Sincerely,
themrvladek
m
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July 16, 2014 4:07:44 AM

shinz13 said:
sir themrvladek, i already tried chkdsk x: f/ or r/ but errors says

Windows cannot recover master file table. CHKDSK aborted.

Do you know what solution about that?


If the damage to Master File Table (MFT) is serious, you have to use third party software, like Active Uneraser for DOS or Active File Recovery for Windows to access and save your files to another drive, and then reformat the drive.
More safer way is to look for help in professional service.
m
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l
July 16, 2014 4:08:44 AM

Performing CHKDSK sometimes cannot be done, and message appeares:
"Windows cannot recover master file table. CHKDSK aborted."
In that case the damage to Master File Table (MFT) could be serious, and you have to use third party software, like Active Uneraser for DOS or Active File Recovery for Windows to access and save your files to another drive, and then reformat the drive.
More safer way is to look for help in professional service.
m
0
l
July 16, 2014 4:11:42 AM

Pourl Oyester said:
hey, i tried doing chkdsk in cmd prompt, but the error says

The type of file system is NTFS.
Unable to determine volume version and state. CHKDSK aborted.

Now what should i do.
error says

H:/ is not accessible.
The file or directory is corrupted or unreadable.


Probably there are corrupted files on drive. You could try to recover drive, but you'll be lucky if recovery programs can even get your files back. One of the best file recovery software (and free!) is Parted Magic.
More safer way is to look for help in professional service.
m
0
l
July 16, 2014 4:24:50 AM

If chkdsk cannot perform its task, then usually appears one of three messages:

1) "Drive is not accessible. Access is denied."
It seems you have no permission (administrator privileges) on your computer to perform chkdsk. There are two ways to get permission before you run chkdsk next time:
The first method: Click Start and in the Search field type: cmd then right-click the Command Prompt icon (cmd.exe) and click Run as administrator, and then type: chkdsk <your external HDD letter:> /f (press Enter).
The other way to get permission to do chkdsk is by enabling the 'super admin account': Click Start and in the Search field type: cmd then right-click the Command Prompt icon (cmd.exe) and click Run as administrator, and type: net user administrator /active:yes (press Enter). The system should return you with the following message: The command completed successfully. Exit the Command Prompt. Click the Start icon, and log off from the current account and in the Account window you should now see the Administrator account. Log in Administrator, open Command Prompt, and perform chkdsk <your external HDD letter:> /f (press Enter). Note: If you want to turn off the Admin account, in Command Prompt type: net user administrator /active:no (press Enter).

2) "Unable to determine volume version and state. CHKDSK aborted."
Probably there are corrupted files on drive. You could try to recover drive, but you'll be lucky if recovery programs can even get your files back. One of the best file recovery software (and free!) is Parted Magic.
More safer way is to look for help in professional service.

3) "Windows cannot recover master file table. CHKDSK aborted."
If the damage to Master File Table (MFT) is serious, you have to use third party software, like Active Uneraser for DOS or Active File Recovery for Windows to access and save your files to another drive, and then reformat the drive.
More safer way is to look for help in professional service.
m
0
l
July 16, 2014 4:38:11 AM

grosbc03 said:
Thank you for your help. I had a similar problem. I ran the CHKDSK. After doing that I received the message stating "drive is not accessible. access is denied.". Any ideas of how to fix this problem.

Thank you


It seems you have no permission (administrator privileges) on your computer to perform chkdsk. There are two ways to get permission before you run chkdsk next time:
The first method: Click Start and in the Search field type: cmd then right-click the Command Prompt icon (cmd.exe) and click Run as administrator, and then type: chkdsk <your external HDD letter:> /f (press Enter).
The other way to get permission to do chkdsk is by enabling the 'super admin account': Click Start and in the Search field type: cmd then right-click the Command Prompt icon (cmd.exe) and click Run as administrator, and type: net user administrator /active:yes (press Enter). The system should return you with the following message: The command completed successfully. Exit the Command Prompt. Click the Start icon, and log off from the current account and in the Account window you should now see the Administrator account. Log in Administrator, open Command Prompt, and perform chkdsk <your external HDD letter:> /f (press Enter). Note: If you want to turn off the Admin account, in Command Prompt type: net user administrator /active:no (press Enter).
m
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July 16, 2014 4:43:51 AM


Hi i have tried the chkdsk and it just says access denied. anything else i can try before i take it to a computer shop. Im having the same file is corrupted or unreadable message. said:

Hi i have tried the chkdsk and it just says access denied. anything else i can try before i take it to a computer shop. Im having the same file is corrupted or unreadable message.


It seems you have no permission (administrator privileges) on your computer to perform chkdsk. There are two ways to get permission before you run chkdsk next time:
The first method: Click Start and in the Search field type: cmd then right-click the Command Prompt icon (cmd.exe) and click Run as administrator, and then type: chkdsk <your external HDD letter:> /f (press Enter).
The other way to get permission to do chkdsk is by enabling the 'super admin account': Click Start and in the Search field type: cmd then right-click the Command Prompt icon (cmd.exe) and click Run as administrator, and type: net user administrator /active:yes (press Enter). The system should return you with the following message: The command completed successfully. Exit the Command Prompt. Click the Start icon, and log off from the current account and in the Account window you should now see the Administrator account. Log in Administrator, open Command Prompt, and perform chkdsk <your external HDD letter:> /f (press Enter). Note: If you want to turn off the Admin account, in Command Prompt type: net user administrator /active:no (press Enter).
Or, there are corrupted files on drive. You could try to recover drive, but you'll be lucky if recovery programs can even get your files back. One of the best file recovery software (and free!) is Parted Magic.
In that case more safer way is to look for help in professional service.
m
0
l
July 16, 2014 4:46:54 AM

Pourl Oyester said:
hey, i tried doing chkdsk in cmd prompt, but the error says

The type of file system is NTFS.
Unable to determine volume version and state. CHKDSK aborted.

Now what should i do.
error says

H:/ is not accessible.
The file or directory is corrupted or unreadable.


Probably there are corrupted files on drive. You could try to recover drive, but you'll be lucky if recovery programs can even get your files back. One of the best file recovery software (and free!) is Parted Magic.
More safer way is to look for help in professional service.
m
0
l
July 16, 2014 4:51:39 AM

babangus said:
themrvladek said:
It is not better to apply first a data recovery software, because that software cannot access inaccessible disk. Prior to use that software it's needed to format hard drive, which means losing data. So, data recovery software is the last option. Really, better is to perform chkdsk as I described above. After all, data recovery software cannot make a miracle, and many of files on formatted disk can be permanently lost, depending on the file format and the ability of data recovery software. Such the best professional software – which is not freeware – could recover from 180 to 200 file formats only, with no 100 percent guarantee to fully recover all the files. E.g. ParetoLogic Data Recovery Pro, or EASEUS Data Recovery Wizard, can recover almost any file. Note: "almost". What about those files that cannont be recovered? That's why data recovery software is the last step. Better is the first step would be chkdsk x: /f and second step chkdsk x: /r (fully correct files, clusters, and sectors on a inaccessible drive). Formatting disk and later recovery data is really the last chance.


Thanks a bunch themrvladek. You own the internet.


This is not true. Do not take this advice. Let me explain.

When you lose access to your files, many things could have happened. Firstly, your directory structure could be corrupted. This is a list of files and their relationships stored on a portion of the drive when you first format your computer. It has simple information like "This folder is inside 'User' folder and 'User' folder is on the root 'Dell' partition" and metadata, such and when the item was last accessed. Most importantly, it stores "pointers". Pointers store the files location on the drive, specifically, where it starts and where it ends. When you format, the first thing that happens is that that data is deleted to make way for a fresh blank disk. Your data stays, but pointers are removed. When you quick format, literally nothing else is done but the removing of this vital data.

Now if you want to make a full drive recovery, your software will have to read each individual bit of your HDD and try to find the beginning and end of each and every file by reading this now formless mass of 1s and 0s on your drive, because YOU deleted the very store of information that keeps this. Usually, a Data Recovery program will comb your directory structure looking for errors and discrepancies. So will chkdsk. 5/10 Chkdsk will find a fault and fix your directory structure, but if some of the opening lines are gone, chkdsk will not know you even have a directory structure and the only thing that will be able to recover that partition is a data recovery program, so please do not format your disk AT ANY TIME if you lose a drive. Using testdisk in concert with a partition recovery program and chkdsk is the best way.

I have recovered a total of 17 drives in my life. Trust me I know what I'm talking about.
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July 16, 2014 5:03:41 AM

genz said:
babangus said:
themrvladek said:
It is not better to apply first a data recovery software, because that software cannot access inaccessible disk. Prior to use that software it's needed to format hard drive, which means losing data. So, data recovery software is the last option. Really, better is to perform chkdsk as I described above. After all, data recovery software cannot make a miracle, and many of files on formatted disk can be permanently lost, depending on the file format and the ability of data recovery software. Such the best professional software – which is not freeware – could recover from 180 to 200 file formats only, with no 100 percent guarantee to fully recover all the files. E.g. ParetoLogic Data Recovery Pro, or EASEUS Data Recovery Wizard, can recover almost any file. Note: "almost". What about those files that cannont be recovered? That's why data recovery software is the last step. Better is the first step would be chkdsk x: /f and second step chkdsk x: /r (fully correct files, clusters, and sectors on a inaccessible drive). Formatting disk and later recovery data is really the last chance.


Thanks a bunch themrvladek. You own the internet.


This is not true. Do not take this advice. Let me explain.

When you lose access to your files, many things could have happened. Firstly, your directory structure could be corrupted. This is a list of files and their relationships stored on a portion of the drive when you first format your computer. It has simple information like "This folder is inside 'User' folder and 'User' folder is on the root 'Dell' partition" and metadata, such and when the item was last accessed. Most importantly, it stores "pointers". Pointers store the files location on the drive, specifically, where it starts and where it ends. When you format, the first thing that happens is that that data is deleted to make way for a fresh blank disk. Your data stays, but pointers are removed. When you quick format, literally nothing else is done but the removing of this vital data.

Now if you want to make a full drive recovery, your software will have to read each individual bit of your HDD and try to find the beginning and end of each and every file by reading this now formless mass of 1s and 0s on your drive, because YOU deleted the very store of information that keeps this. Usually, a Data Recovery program will comb your directory structure looking for errors and discrepancies. So will chkdsk. 5/10 Chkdsk will find a fault and fix your directory structure, but if some of the opening lines are gone, chkdsk will not know you even have a directory structure and the only thing that will be able to recover that partition is a data recovery program, so please do not format your disk AT ANY TIME if you lose a drive. Using testdisk in concert with a partition recovery program and chkdsk is the best way.

I have recovered a total of 17 drives in my life. Trust me I know what I'm talking about.


Daer genz,
I told, "... format hard drive, which means losing data"
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July 16, 2014 5:41:43 AM

grosbc03 said:
Thank you for your help. I had a similar problem. I ran the CHKDSK. After doing that I received the message stating "drive is not accessible. access is denied.". Any ideas of how to fix this problem.

Thank you


Probably, you have no permission (administrator privileges) on your computer to perform chkdsk.
Click Start and in the Search field type: cmd then right-click the Command Prompt icon (cmd.exe) and click Run as administrator, and then type: chkdsk <your external HDD letter:> /f (press Enter).
Or, enablie 'super admin account': Click Start and in the Search field type: cmd then right-click the Command Prompt icon (cmd.exe) and click Run as administrator, then type: net user administrator /active:yes (press Enter). The system should return you with the following message: The command completed successfully. Exit the Command Prompt. Click the Start, and log off from the current account, and in the Account window you should now see the Administrator account. Log in Administrator, open Command Prompt, and perform chkdsk <your external HDD letter:> /f (press Enter). Note: If you want to turn off the Admin account, in Command Prompt type: net user administrator /active:no (press Enter).
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July 16, 2014 5:45:05 AM

grosbc03 said:
Thank you for your help. I had a similar problem. I ran the CHKDSK. After doing that I received the message stating "drive is not accessible. access is denied.". Any ideas of how to fix this problem.

Thank you


It seems you have no permission (administrator privileges) on your computer to perform chkdsk.
Click Start and in the Search field type: cmd then right-click the Command Prompt icon (cmd.exe) and click Run as administrator, and then type: chkdsk <your external HDD letter:> /f (press Enter).
The other way to get permission is by enabling 'super admin account': Click Start and in the Search field type: cmd then right-click the Command Prompt icon (cmd.exe) and click Run as administrator, and type: net user administrator /active:yes (press Enter). The system should return you with the following message: The command completed successfully. Exit the Command Prompt. Click the Start icon, and log off from the current account and in the Account window you should now see the Administrator account. Log in Administrator, open Command Prompt, and perform chkdsk <your external HDD letter:> /f (press Enter).
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July 16, 2014 5:51:36 AM

grosbc03 said:
Thank you for your help. I had a similar problem. I ran the CHKDSK. After doing that I received the message stating "drive is not accessible. access is denied.". Any ideas of how to fix this problem.

Thank you


Maybe only reason is that you have no permission (administrator privileges) on your computer to perform chkdsk.
So, click Start and in the Search field type: cmd then right-click the Command Prompt icon (cmd.exe) and click Run as administrator, and then type: chkdsk <your external HDD letter:> /f (press Enter).
Or, yo can enable the 'super admin account': Click Start and in the Search field type: cmd then right-click the Command Prompt icon (cmd.exe) and click Run as administrator, and type: net user administrator /active:yes (press Enter). The system should return you with the following message: The command completed successfully. Exit the Command Prompt. Click the Start icon, and log off from the current account and in the Account window you should now see the Administrator account. Log in Administrator, open Command Prompt, and perform chkdsk <your external HDD letter:> /f (press Enter)
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July 16, 2014 5:56:55 AM

notsosmartypants said:
It says "the type of the file system is NTFS. unable to determine volume version and state. CHKDSK aborted.

Please Help!!!


Maybe there are corrupted files on drive. You could try to recover drive, but you'll be lucky if recovery programs can even get your files back. One of the best file recovery software (and free!) is Parted Magic.
More safer way is to look for help in professional service.
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July 16, 2014 6:00:15 AM

grosbc03 said:
Thank you for your help. I had a similar problem. I ran the CHKDSK. After doing that I received the message stating "drive is not accessible. access is denied.". Any ideas of how to fix this problem.

Thank you


Try to get permission (administrator privileges) to perform chkdsk:
Click Start and in the Search field type: cmd then right-click the Command Prompt icon (cmd.exe) and click Run as administrator, and then type: chkdsk <your external HDD letter:> /f (press Enter).
Or, you can enable 'super admin account': Click Start and in the Search field type: cmd then right-click the Command Prompt icon (cmd.exe) and click Run as administrator, and type: net user administrator /active:yes (press Enter). The system should return you with the following message: The command completed successfully. Exit the Command Prompt. Click the Start icon, and log off from the current account and in the Account window you should now see the Administrator account. Log in Administrator, open Command Prompt, and perform chkdsk <your external HDD letter:> /f (press Enter).
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July 16, 2014 6:04:28 AM

grosbc03 said:
Thank you for your help. I had a similar problem. I ran the CHKDSK. After doing that I received the message stating "drive is not accessible. access is denied.". Any ideas of how to fix this problem.

Thank you


Message, "Drive is not accessible. Access is denied." means that you have no permission (administrator privileges) to perform chkdsk.
Click Start and in the Search field type: cmd then right-click the Command Prompt icon (cmd.exe) and click Run as administrator, and then type: chkdsk <your external HDD letter:> /f (press Enter).
Or. enable 'super admin account': Click Start and in the Search field type: cmd then right-click the Command Prompt icon (cmd.exe) and click Run as administrator, and type: net user administrator /active:yes (press Enter). The system should return you with the following message: The command completed successfully. Exit the Command Prompt. Click the Start icon, and log off from the current account and in the Account window you should now see the Administrator account. Log in Administrator, open Command Prompt, and perform chkdsk <your external HDD letter:> /f (press Enter). Note: If you want to turn off the Admin account, in Command Prompt type: net user administrator /active:no (press Enter).
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July 16, 2014 6:07:48 AM

Yssa Balagtas said:
13645450,0,1703917 said:
sir themrvladek, i already tried chkdsk x: f/ or r/ but errors says

Windows cannot recover master file table. CHKDSK aborted.

Do you know what solution about that?[/q

I encountered the same but if you will read carefully the instructions x: is the name of your HDD so is your HDD file name is H: or G: then change x: with h: or g:
said:


"Windows cannot recover master file table. CHKDSK aborted." means that the damage to Master File Table (MFT) could be very serious, so you have to use third party software, like Active Uneraser for DOS or Active File Recovery for Windows to access and save your files to another drive, and then reformat the drive.
More safer way is to look for help in professional service.
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July 16, 2014 6:16:40 AM

Notice:
I apologize to all whom I answered with a delay.
The reason was the breakdown on my computer that even after the repairation isn't working completely fine, so it is possible that I answered several times the same question.
Thank you.
Sincerely,
themrvladek
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July 16, 2014 6:20:23 AM

Teacher2014 said:
themrvaladek: I am a teacher and had all my work on a harddrive that today said 'corruped and unreadable' I nearly cried! I had backed up some but not all of the recent stuff. I frantically searched the web and came across your advice and it worked!!!! I am SO grateful!!!! And i have now backed up all my harddrive.
It now works fine but do you think i should use it or buy a replacement??


No worry, you can use it.
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8 minutes ago

IZUKANJI said:

HDD External Hard Drive Corrupted and Unreadable, What should I do?


themrvladek said:
IZUKANJI said:
HDD External Hard Drive Corrupted and Unreadable, What should I do?


If you are under Windows operating system, go to Start > All Programs > Accessories, right-click on Command Prompt and select Run as administrator. In cmd window that appears type this:
chkdsk x: /f
(where x = drive letter associated with your external hard drive, and before x: and after x: there is a space)
and press Enter.
Command chkdsk (check disk) will correct errors and your external hard drive will be accessible again.


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!