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Unusable USB after interrupted chkdsk /r

Posted: 10 Apr 2019, 19:14
by DenMax
It looked like common issue but I couldn't find any topic with such case. The chkdsk /r was somehow interrupted on JetFlash 500 8GB (possibly bad USB ports connection), after that it is still detecting as storage USB device, but with no access, no partition, it slows file explorer, can't even say if it is RAW or not because disk managment takes ages to connect to "virtual disk service". Device manager recognizes it as normal JetFlash 500 8GB device and after about 20 min it can even say it has ~7700 MB disk space, but 0 allocated.
Testdisk gives me this:

Code: Select all

Main menu:
Disk /dev/sdd - 8103 MB / 7728 MiB - JetFlash Transcend 8GB
     CHS 985 255 63 - sector size=512

Analyze:
     Partition                  Start        End    Size in sectors
 1 * HPFS - NTFS              0  32 33   985  46 21   15824896
Bad sector count.

Quick Search:
Disk /dev/sdd - 8103 MB / 7728 MiB - CHS 985 255 63
     Partition               Start        End    Size in sectors
>* HPFS - NTFS              0   1  1   985 254 63   15840027
I can't list files in the "Quick Search" found partition because of "Can't open filesystem. Filesystem seems damaged.", it also doesn't have a backup. "Deep Search" takes 2 hours to analyze 11/~980 cylinders, so idk about it, don't have 2 lifes for this to end :lol: .
I can list files using "Advanced", and I even have restored (some) files (~1 GB) after 3 full days of recovery process (!)... Every action with this usb takes ages in current condition.
Please help me, I think that on hardware level this USB is ok, just chkdsk messed up filesystem/sector map and it can be restored with all data, but idk what to do next.

Re: Unusable USB after interrupted chkdsk /r

Posted: 11 Apr 2019, 06:06
by cgrenier
As written in https://www.cgsecurity.org/testdisk.pdf you can
- use ddrescue to clone the USB key and run photorec on the image file (recommended)
- run photorec on the USB key

Re: Unusable USB after interrupted chkdsk /r

Posted: 11 Apr 2019, 06:52
by DenMax
Thanks, I'll try this out, but what should I do next to recover the flash drive?

Re: Unusable USB after interrupted chkdsk /r

Posted: 11 Apr 2019, 13:07
by recuperation
DenMax wrote:
11 Apr 2019, 06:52
Thanks, I'll try this out, but what should I do next to recover the flash drive?
Nothing. After following the advice of cgrenier, you're done.

Re: Unusable USB after interrupted chkdsk /r

Posted: 11 Apr 2019, 16:32
by DenMax
Sorry, I don't get it. I can restore files with Photorec method, but what can I do to make this usb drive usable again? Or is it completely dead?

Re: Unusable USB after interrupted chkdsk /r

Posted: 11 Apr 2019, 21:17
by recuperation
DenMax wrote:
11 Apr 2019, 16:32
Sorry, I don't get it. I can restore files with Photorec method, but what can I do to make this usb drive usable again? Or is it completely dead?
OK, you want a hint for USB-stick repair?
You could reformat it and use a tool like h2testw to test its abilities.
If the verify run fails, consider it as dead.
If the verify run succeeds, there might be an increased risk of failure in the future nevertheless.
I would not use it anymore.

Re: Unusable USB after interrupted chkdsk /r

Posted: 12 Apr 2019, 19:02
by DenMax
Thanks, I meant what should I do with Testdisk to even format it because OS doesn't allow me to do anything with it, but I think I'll fugure it out by myself :D The topic can be closed as solved, thanls a lot!

Re: Unusable USB after interrupted chkdsk /r

Posted: 02 May 2019, 09:49
by DenMax
For those, who is interested, the only way to recover the usb drive itself was to reflash its firmware using SMI MPTool, nothing else helped.

Re: Unusable USB after interrupted chkdsk /r

Posted: 02 May 2019, 11:56
by recuperation
I see no interest in repairing and reusing a drive that most probably has a hardware issue.