Windows 7 Forums

Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.


Windows 7: Corrupted disk structure, tried repair, only found one partition.

06 Feb 2016   #1
neoplasm

Windows 10 64 bit.
 
 
Corrupted disk structure, tried repair, only found one partition.

I'm running windows 10 on a Samsung 250gb SSD.
Along with it I have two 500gb seagate hard drives, each partitioned in half. Giving me 4 separate volumes from the OS which I used for games, music, picture, etc.

A couple of nights ago, I woke up to notice that windows had run a scheduled update and was now restarting, but was stuck at 0% running a check disk on one of the volumes that belonged to one of the Seagate drives. One of the partitions on this drive was for my steam games folder. However I can't remember what exactly was on the other sister volume. As it was the middle of the night and the check disk was not advancing any further after a good half an hour I turned off the PC in case the hard drive was failing so I could take a look at it later.

Later being today, the first thing I did was go into the disk management utility built into windows, where I quickly noticed that the drive is flagged as an Invalid Disk. A quick search led me to a tutorial that instructed to download a hex editor and look for a value of 42 in Sector 0 under line 1C0 and changing it to 07.

Which I did, but the tutorial also instructed to look elsewhere for the same value under other lines in case the drive had several partitions, which is my case, however I couldn't not find the value in the other lines it suggested, and just changing all instances of the 42 value throughout the whole drive doesn't seem safe.

The problem I'm having is that the fix from the tutorial only partially worked, as the drive is no longer getting flagged as invalid, but windows still doesn't recognize the drive properly; it lists it as a RAW partition. Doing some more searching here led me to download MiniTool Partition Wizard.

I ran the scan and it was able to find one of the volumes that was previously there, which I'm guessing is the first volume on the drive and was flagged as active or fixed by the hex edit from the tutorial. I closed the partition wizard without making any changes because it advised it would delete the missing partition as it saw it as unallocated space in order to activate the one it found.

My question is; should I go ahead and do what the tutorial suggests and change all instances of the value 42 with the hex editor, and then run the partition wizard to see if the other volume is found, or is there another tool that will help me unlock the other partition?


My System SpecsSystem Spec
.
06 Feb 2016   #2
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Run this command: CHKDSK N: /f /v /r /x. Replace N with the letter of your disk.
My System SpecsSystem Spec
06 Feb 2016   #3
neoplasm

Windows 10 64 bit.
 
 

Here's what I got after I ran it.

C:\WINDOWS\system32>CHKDSK E: /f /v /r /x
The type of the file system is NTFS.
Volume label is SG-01.
Corrupt master file table. Windows will attempt to recover
master file table from disk.
Windows cannot recover master file table. CHKDSK aborted.


Is there a utility or way to rebuild the master file table?
My System SpecsSystem Spec
.

06 Feb 2016   #4
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Supposedly there are ways to rebuild the MFT. I have never used one and do not know how well they work.
My System SpecsSystem Spec
06 Feb 2016   #5
jumanji

Windows 7 Home Premium 32 bit
 
 

Hi neoplasm,

1. Please post the link to the tutorial you mentioned suggesting to look for a value of 42 in Sector 0 under line 1C0 and changing it to 07. I have to assess whether this could have led to the Corrupt MFT. Did you save the original Sector 0, before you modified it?

2. Partition Wizard: Please upload the following screenshots:
a) The first screen that appears when you launch PW showing all your drives.
b) Run Partition Recovery Wizard Quick Scan on the corrupt 500GB Seagate drive and post the
screenshot of the found partitions.
c) Next do a Full Scan - which may take quite sometime - and post the screenshot of Found
Partitions.

And yes, Cancel the operation at the end and do not make any changes.

3. We do have some definite information as a result of the checkdisk run - Corrupt Master File Table.We shall see how to deal with it after the above inputs.

Upload the screenshots to SevenForum Servers. Screenshots and Files - Upload and Post in Seven Forums
My System SpecsSystem Spec
07 Feb 2016   #6
jumanji

Windows 7 Home Premium 32 bit
 
 

Also post an untruncated screenshot of Windows Disk Management following the guidelines here, Disk Management - Post a Screen Capture Image
My System SpecsSystem Spec
07 Feb 2016   #7
neoplasm

Windows 10 64 bit.
 
 

Hello thanks for helping me out.

Here is the link to the tutorial

https://www.youtube.com/watch?v=QQgRkEuFQac

I did not save the sector before editing as I was not able to make the drive accessible before the edit, and I was not familiar with the features of the editor.

a)
Corrupted disk structure, tried repair, only found one partition.-1.png

b)
Corrupted disk structure, tried repair, only found one partition.-2.2.png

c)
Corrupted disk structure, tried repair, only found one partition.-3.png

DM)
Corrupted disk structure, tried repair, only found one partition.-dm.png


My System SpecsSystem Spec
07 Feb 2016   #8
jumanji

Windows 7 Home Premium 32 bit
 
 

A quick question now before you retire for the day. ( I shall write a detailed post later which you can see tomorrow morning. You are almost 12 hours behind me. My morning is your previous day night.)

You said you have two 500GB drives each partitioned into two. But I see only one in all the screenshots. What about the other?
My System SpecsSystem Spec
07 Feb 2016   #9
neoplasm

Windows 10 64 bit.
 
 

Thanks you're right I'm about to retire for the night. Hope you have a good day.
Look forward to reading your follow up tomorrow morning.

I disconnected that drive when I first started to diagnose the issue. I didn't want to confuse myself by having that other drive in there.
My System SpecsSystem Spec
08 Feb 2016   #10
jumanji

Windows 7 Home Premium 32 bit
 
 

My observations:

1. Though Partition Wizard shows one Partition/ drive E: NTFS 232.88 GB Used 100% and another Unallocated 232.88GB, Windows Disk Management shows the full volume E: 465.76GB, as RAW. So Check disk ran on the full volume - not appropriate when we know that there were two volumes in it - and for that reason I shall reject its finding.( There were two volumes and two MFTs. Which MFT did it tackle? )
No action is required on your part on this observation. Just confirm that the WDM screenshot is the current one and not one taken much earlier/ prior to the PW screenshot/prior to running checkdisk.

2. Action required: Run PW PRW Quickscan again. When it shows the found partition as in your screenshot b) in your post #7, just doubleclick on that line (as instructed in that Window) and check whether it shows all your files. Post a screenshot.

Corrupted disk structure, tried repair, only found one partition.-08-02-2016-12-02-32.jpg

Cancel after you take the screenshot without making any changes.

Will continue after a breather.


My System SpecsSystem Spec
Reply

 Corrupted disk structure, tried repair, only found one partition.




Thread Tools Search this Thread
Search this Thread:

Advanced Search




Similar help and support threads
Thread Forum
Pendrive Inaccessible - Disk structure is corrupted or unreadable!
I download everything from the internet into my 32 GB HP Pendrive and also use it for Windows Ready Boost. But yesterday suddenly it gave the error message - G:\ is not accessible. The disk structure is corrupted and unreadable. I ran CHKDSK /r and the following is the output. The...
Hardware & Devices
sfc and startup repair found corrupted files but can't fix
Win 7 starts ok but sfc reports corrupted files Cbs Log attached. Any advice will be appreciated
Performance & Maintenance
Need Partition help? Startup repair says no OS files found on disk.
After running startup repair, the details state the root cause to be "No OS files found on disk. Repair action: Partition table repair. Result: Failed. Error code = 0x3f8" I have Partition Wizard and have a funny feeling that might help, but I'm not 100% sure how to use that software for this...
General Discussion
Hard disk Error - The disk structure is corrupted and unreadable.
I have IOmega 1 TB hard drive. 2 days ago, my comp restarted suddenly after which my external drive is corrupted. I get the error 'H: is not accessble' The disk structure is corrupted and unreadable. It shows up in the disk management as RAW file system, I have almost 700 GB of important...
Hardware & Devices
"The disk structure is corrupted and unreadable"
Hi guys. A few day ago, when I tried to started my laptop (hp probook 4534s), i got disk check. After that when I try to download something i get this error ("The disk structure is corrupted and unreadable") and I cant download it. And when i try to install mozilla firefox i get new 7-zip error...
Hardware & Devices
Laptop DVD-RW Issue: "The disk structure is corrupted and unreadable"
I am working on someones laptop with the complaint that the DVD drive stopped working. It was working last night. Running W7 32 bit. I tried to play some CDs and DVDs in Windows. Tried to boot a Linux disk, a Partition Wizard Disk, an Acronis Boot disk, a Windows 7 Disk. No play, no boot. In...
Hardware & Devices


Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 23:05.

Twitter Facebook Google+



Windows 7 Forums

Seven Forums Android App Seven Forums IOS App