Trouble mounting external HD [SOLVED]

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locowrench
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Trouble mounting external HD [SOLVED]

Post by locowrench » Mon Oct 30, 2017 5:31 pm

Hi all,

Please forgive my inexperience. I am relatively new to Linux Mint, and am not very computer literate in general.

I have two personal computers, one desktop and one laptop, both running Linux Mint 18.2 Cinnamon. I have been using a Samsung 1 TB external USB HD with my desktop machine without any problem for some time. Recently, I tried to copy some files from my laptop onto the external drive. Since then, I can't get the external drive to mount on either computer. When I power up the drive and connect to a USB port on either machine I get this error message:
External drive screenshot.png
The drive shows up in the disc utility, but I can not seen to get it to mount.

I'd like to recover some of the other data on this drive. Any ideas as to what I might try?

Thank you for any advice you can offer.
Last edited by locowrench on Thu Nov 02, 2017 5:46 pm, edited 1 time in total.

Mute Ant
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Re: Trouble mounting external HD

Post by Mute Ant » Mon Oct 30, 2017 6:04 pm

Linux-the-kernel supports reading NTFS. You might try manually mounting your partition read-only on the /mnt folder...
sudo mount /dev/sdb1 -t ntfs -o ro /mnt
...to look at the contents and make copies.

If you intend to keep the drive formatted as NTFS, you need a Windows-Competent machine to repair the file system, not Linux.
Data stored in an encrypted volume will only be accessible with the original password. Without this key, all the data will remain scrambled beyond hope of recovery.

locowrench
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Re: Trouble mounting external HD

Post by locowrench » Mon Oct 30, 2017 7:30 pm

Mute Ant wrote:Linux-the-kernel supports reading NTFS. You might try manually mounting your partition read-only on the /mnt folder...
sudo mount /dev/sdb1 -t ntfs -o ro /mnt
...to look at the contents and make copies.

If you intend to keep the drive formatted as NTFS, you need a Windows-Competent machine to repair the file system, not Linux.

Thank you for taking the time to reply to my questions. I did as you suggested and received essentially the same error message:

$MFTMirr does not match $MFT (record 0).
Failed to mount '/dev/sdb1': Input/output error
NTFS is either inconsistent, or there is a hardware fault, or it's a
SoftRAID/FakeRAID hardware. In the first case run chkdsk /f on Windows
then reboot into Windows twice. The usage of the /f parameter is very
important! If the device is a SoftRAID/FakeRAID then first activate
it and mount a different device under the /dev/mapper/ directory, (e.g.
/dev/mapper/nvidia_eahaabcc1). Please see the 'dmraid' documentation
for more details.


I am also curious as to what caused the drive to malfunction in the first place. As a test, I tried loading some flies from my laptop onto a flash drive. Afterwards the flash drive would no longer mount even after reformatting.

Mute Ant
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Re: Trouble mounting external HD

Post by Mute Ant » Mon Oct 30, 2017 8:54 pm

A simple unmounted readability test perhaps. Will it fetch the first GiB off the drive...
sudo head -c 1G /dev/sdb1 > /dev/zero && echo "Okay"
Data stored in an encrypted volume will only be accessible with the original password. Without this key, all the data will remain scrambled beyond hope of recovery.

locowrench
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Re: Trouble mounting external HD

Post by locowrench » Tue Oct 31, 2017 5:49 pm

Mute Ant wrote:A simple unmounted readability test perhaps. Will it fetch the first GiB off the drive...
sudo head -c 1G /dev/sdb1 > /dev/zero && echo "Okay"
Thank you once more for your insight.

I did as you suggested, and interestingly, I received "Okay" as the ouput. So the first GB of data seems to be readable. I ran the same command again with 5 G and "Okay" again. Promising

budgiebandolier
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Re: Trouble mounting external HD

Post by budgiebandolier » Wed Nov 01, 2017 1:44 pm

Try here https://wmarkito.wordpress.com/2010/12/ ... -record-0/ worked very quickly and repaired my problem with the same message.

locowrench
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Re: Trouble mounting external HD

Post by locowrench » Wed Nov 01, 2017 6:39 pm

budgiebandolier wrote:Try here https://wmarkito.wordpress.com/2010/12/ ... -record-0/ worked very quickly and repaired my problem with the same message.
Thank you very much for posting this. I have been able to recover my data and my external drive is working correctly again.

I wonder if I should reformat the drive to something other than NTFS.

budgiebandolier
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Re: Trouble mounting external HD

Post by budgiebandolier » Thu Nov 02, 2017 6:16 am

Always happy to pass on useful links that worked. I have left the disc as NTFS and no further problems but I was transferring a large volume of data when it went wrong and have since done no more than 1GB at a tme.

minitux
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Re: Trouble mounting external HD

Post by minitux » Thu Nov 02, 2017 6:38 am

the message was clear, make a check disk from windows
locowrench wrote:SoftRAID/FakeRAID hardware. In the first case run chkdsk /f on Windows
If you do not have windows you can try with

Code: Select all

sudo ntfsfix /dev/sdb1

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