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Windows 7: External hard drive visible in Partition Magic but not explorer

14 Jun 2015   #11
jumanji

Windows 7 Home Premium 32 bit
 
 

OK, run TestDisk again. I would like to see the screenshot of the Second screen where you selected the 3TB Disk. Just wanting to confirm that Disk capacity is shown correctly.

When you reach the screen you had posted above, [Boot] is highlighted. Press Enter and post the ensuing screen.

After posting the above two screenshots you can quit TestDisk till I see it and return with a reply post.


My System SpecsSystem Spec
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15 Jun 2015   #12
nexus87

Windows 7 Ultimate 64 bit
 
 

Quote   Quote: Originally Posted by jumanji View Post
ok, run testdisk again. I would like to see the screenshot of the second screen where you selected the 3tb disk. Just wanting to confirm that disk capacity is shown correctly.
External hard drive visible in Partition Magic but not explorer-2015-06-15-13_16_40-c__users_leon_desktop_testdisk-7.0_testdisk_win.exe.png

Quote   Quote: Originally Posted by jumanji View Post
when you reach the screen you had posted above, [boot] is highlighted. Press enter and post the ensuing screen.
External hard drive visible in Partition Magic but not explorer-2015-06-15-13_19_27-c__users_leon_desktop_testdisk-7.0_testdisk_win.exe.png


My System SpecsSystem Spec
15 Jun 2015   #13
jumanji

Windows 7 Home Premium 32 bit
 
 

OK, thanks for the screenshots. The correct disk capacity is shown. And in your case both the boot sector and backup boot Sector are ok and both are identical.( Boot Sector here refers to the NTFS boot sector which is the first sector of the partition which is also known as Partition Boot Record/Volume Boot Record. Not to be confused with MBR boot sector 0, which we rebuilt with Partition Wizard earlier.)

Move to [MFT Repair] with right arrow and enter. Read "Repair an NTFS MFT" here Advanced NTFS Boot and MFT Repair - CGSecurity

"The MFT (Master File Table) is sometimes corrupted. If Microsoft's Checkdisk (chkdsk) failed to repair the MFT, run TestDisk. In the Advanced menu, select your NTFS partition, choose Boot, then Repair MFT. TestDisk will compare the MFT and MFT mirror (its backup). If the MFT is damaged, it will try to repair the MFT using the backup. If the MFT backup is damaged, it will use the main MFT.
If both MFT and MFTMirr are damaged and thus cannot be repaired using TestDisk, you might want to try commercial software like Zero Assumption Recovery, GetDataBack for NTFS or Restorer 2000."

If Test Disk repairs the MFT, well and good. Consider yourself lucky. (In most cases TestDisk is unable to repair MFT). If not GetDataback Simple.

If you do not want to spend $70, then go ahead with PhotoRec. While it will recover most of your files what you will get is a bunch of files renamed with numbers without the folder structure. GetdataBack simple on the other hand should let you copy the original folders and files with the folder structure intact.

Good Luck. Report whether MFT Repair was successful.
My System SpecsSystem Spec
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15 Jun 2015   #14
nexus87

Windows 7 Ultimate 64 bit
 
 

Thanks, jumanji. I'll run that when I can and get back to you.
My System SpecsSystem Spec
15 Jun 2015   #15
nexus87

Windows 7 Ultimate 64 bit
 
 

When I ran Repair MFT I got this immediately

External hard drive visible in Partition Magic but not explorer-2015-06-15-22_42_52-c__users_leon_desktop_testdisk-7.0_testdisk_win.exe.png

Nothing else happened


My System SpecsSystem Spec
15 Jun 2015   #16
jumanji

Windows 7 Home Premium 32 bit
 
 

Reboot, plug in your drive and see whether you can access your files.

Examine it in Windows Disk Management and PW. Is it still showing as RAW in Disk Management and 100% full in PW?

Run check disk from command prompt.

Open Command prompt. Start > All programs > Accessories > Command Prompt

Type
CHKDSK K: /f /v /r /x Press enter. Note: Replace K: with the actual drive letter of the external drive

Allow check disk to complete.
My System SpecsSystem Spec
16 Jun 2015   #17
nexus87

Windows 7 Ultimate 64 bit
 
 

Woohoo! Chkdsk finished and the disk looks like it's back to normal! Thanks for all your help jumanji

External hard drive visible in Partition Magic but not explorer-2015-06-16-21_37_17-computer.png


My System SpecsSystem Spec
16 Jun 2015   #18
jumanji

Windows 7 Home Premium 32 bit
 
 

That was some real good thing to see - the solved tick mark - early in the morning when I barged into Seven Forums . You did a great job in executing all the instructions patiently without panicking. Since you already had some familiarity with data recovery programs, it made my job easy.

Now here is a tip.

Install bootice (x86 version for Windows 32bit and x64 version for Windows 64bit) Bootice Download - Softpedia

Save all the important sectors shown in the Partition Table by sector number to another drive..(Each saved .bin file will be 512bytes or 4096 bytes depending upon the sector size of your HDD - 512 for drives <2TB, 4096 for drives >2TB generally)

External hard drive visible in Partition Magic but not explorer-17-06-2015-08-16-16.jpg

When you encounter any accessibility problems with that drive, simply restore the saved sectors.

In most cases restoring the sector 0 (MBR + partition table) and other Volume Boot Records can make your drive accessible again.

Even if not - in rest of the cases, it will make the process of restoring your hard drive or recovering data simpler.

Your case is an illustration of this philosophy.

Even after restoring the sector 0 (MBR+Partition Table) and other volume boot records, you will still not able to access the drive.

Knowing that everything else is fine - after such a restore, we would have straightaway gone to the last step above - running check disk. There would have been no need for running PW to rebuild MBR, rewrite the partition table and use TestDisk to restore the volume boot record or repair MFT. We were literally groping in the dark trying to do all this only to find that everything was fine

Saving with bootice: Lost partitions!

Note: For GPT drives in addition to the important sectors shown by bootice, you also need to save their backups residing at Sector n (the last sector - backup of the GPT Header), and n-32 ( backup of the GPT partition table (four partitions) for 512bytes/sector drives) or n-4 ( backup of the GPT partition table (thirty two partitions) for 4096bytes/sector drives)


My System SpecsSystem Spec
17 Jun 2015   #19
nexus87

Windows 7 Ultimate 64 bit
 
 

I'll certainly try that and be a lot more careful when disconnecting the drive from now on. The only thing I can think of that might have caused this was last week when I was copying a lot of files to the drive across the network which I cancelled partway through.
My System SpecsSystem Spec
17 Jun 2015   #20
jumanji

Windows 7 Home Premium 32 bit
 
 

Yep, that is one of the cardinal rules. You should always "safely remove" the drives. That will prevent the drive being removed during the read/write process if you heed to the warning " The drive is still in use. Close all running programs and try again" But in most cases you will not know which running process/es is holding the drive. In that event you need to shut down the computer. During the shut down process the OS will terminate all running processes properly and after the shut down you can remove the drive.

If you are plagued with this situation more often, and do not want to shut down to kill the running processes then use the program Unlocker More programs by Cedrick Collomb - Softpedia or any other program that finds the running processes and kill those. ( In my case Perfect Disk keeps running in the background defragmenting the drives whenever the drive is idle and that prevents the external drive being safely removed. I use unlocker to kill the processes and then remove the drive)

Note: Whenever you install new programs especially free programs, watch out during the installation and say no any to "add-ons" that may get installed otherwise. When I installed Unlocker there was no Open Candy but now I think it is there with Unlocker.

While "Safely Remove" is in your control, there may be some abrupt shut downs due to failure of the Main power supply or hardware failure and in these cases the external drives being used may become inaccessible.

You will be better prepared to deal with such situations, if you save the important sectors on your drives for later restoration.
My System SpecsSystem Spec
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 External hard drive visible in Partition Magic but not explorer




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