Hi, I was trying to extract Kon Boot on my pen drive and my external HDD was also connected, kon boot setup files were in my external HDD and i was running it from my external HDD, I accidentally extracted it to my external HDD but the process was really fast once i clicked, it gave an error msg saying it couldn't be written. After that I couldn't access to my external HDD, it doesn't even show on My Computer, only gives power to the external HDD. BUt if i connect it to another PC it shows my external HDD but when I click it, it says to format my HDD.

external HDD brand and model - Transcend Portable Hard Drive StoreJet 25H3 USB 3.0 1TB

I used Partition Editor from Ultimate Boot CD to check my drive and this what I got ---
{
GParted 0.16.1 --enable-libparted-dmraid
Libparted 3.1
Check and repair file system (fat32) on /dev/sdd1 00:05:37 ( ERROR )

calibrate /dev/sdd1 00:00:00 ( SUCCESS )

path: /dev/sdd1
start: 2048
end: 1953521663
size: 1953519616 (931.51 GiB)
check file system on /dev/sdd1 for errors and (if possible) fix them 00:00:30 ( SUCCESS )

dosfsck -a -w -v /dev/sdd1

dosfsck 3.0.16 (01 Mar 2013)
dosfsck 3.0.16, 01 Mar 2013, FAT32, LFN
Checking we can access the last sector of the filesystem
Boot sector contents:
System ID "MSWIN4.1"
Media byte 0xf8 (hard disk)
512 bytes per logical sector
2048 bytes per cluster
33 reserved sectors
First FAT starts at byte 16896 (sector 33)
2 FATs, 32 bit entries
1908947968 bytes per FAT (= 3728414 sectors)
Root directory start at cluster 2646752 (arbitrary size)
Data area starts at byte 89717258752 (sector 175229021)
444572648 data clusters (910484783104 bytes)
63 sectors/track, 255 heads
2048 hidden sectors
1953519616 sectors total
Both FATs appear to be corrupt. Giving up.

grow file system to fill the partition 00:05:07 ( ERROR )

using libparted
libparted messages ( INFO )

Out of memory.
}


This is the error I got when I tried to mount my disk from Linux----

undevil: error 64: unable to determine device fstype - specify with -t


All I want is to recover my data back so can someone please help me.
Thank You!

I think the above details will be enough to give a solution to my problem

Run R-Studio or similar and do a scan on the drive.

_________________
Web: https://www.day1data.de

Try this:
Start: All Programs: Accessories: Right click on Command Prompt, run as administrator...

at the prompt type:
chkdsk (Your problem drive letter here no parentheses): /x

hit enter.

wait.

this will fix the most likely cause for windows to be crying for you to format a good drive... corrupted data... you maybe didn't wait for a write to finish or lost power to the drive... this will find and correct it.


Let me know if this is helpful.

_________________
Regular Backup Means a Lot

My advice is not to write to the drive. I would avoid CHKDSK since it appears that the boot sector and FATs are inconsistent.

Instead I would examine the drive with a disc editor in read-only mode. Can you show us the Partitions window in DMDE (freeware disc editor)?

http://dmde.com/

The 2 FATs occupy about 4GB. Since they are corrupt, then it appears that this area of the drive may not have been touched by the Kon Boot extraction procedure.

_________________
A backup a day keeps DR away.

None of the them worked

anyway thanks!

What do you mean? DMDE should find your partitions. That's where we start. Then we examine the various file system components. DMDE is not a single-click fix-everything-that's-wrong-with-my-hard-drive tool.

_________________
A backup a day keeps DR away.

I have another problem, my external HDD does not show on my laptop but it recognizes on other laptops. Why does this happen???

Something is wrong with the laptop.

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On a clear disk you can seek forever.

Laptop works fine, my other devices (pen drives) work with no problems. Perhaps because my external HDD got corrupted in my laptop, and the laptop doesn't recognize it now. And the external HDD works only on other PCs. Can someone please tell me how I can fix that?

Thank u!

Maybe you have to force windows to re-enumerate the usb stuff related to that hard disk? Use something like USBDeview and kill the references to the external disk? http://www.nirsoft.net/system_tools.html

I had that problem a few times in the past.

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On a clear disk you can seek forever.

I tried it, it doesn't work. USBDeview shows that my HDD is NOT connected

trying a different usb port also sometimes works. you did reboot the laptop as one of the first steps, right?

yes I did reboot and I tried on all my USB ports on my Laptop but nothing seems to work

I tried it but still its the same.

I went to Disk Management and saw that my external drive has no letter, so I named it G. then i saw my external HDD on my Computer.

when I try this command chkdsk /F /R /X G: I dont get anything, I just get "The type of the files ystem is FAT32"
I don't see data being checked or processed. Why is this happening???