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Unable to change permission for external drive on ubuntu

Operating Systems


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  #1  
Old 02-01-2012
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Join Date: Nov 2011
Posts: 61
Unable to change permission for external drive on ubuntu
  

How can I change the file permission of the external drive???? Well I used to transfer data among various computers. In today morning I found as read-only file system rather than of writeable stick. Is there any work around to make the stick read and write???? Any help on the above mentioned issue will be highly appreciated. Thanks a lot in advance.

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  #2  
Old 02-01-2012
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Join Date: May 2011
Posts: 392
Re: Unable to change permission for external drive on ubuntu

Looking at the matter I am suggesting following command which you can run on the termail and tell me about the output.
Code:
sudo chmod 777 /media/LEXAR
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  #3  
Old 02-01-2012
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Join Date: Jun 2011
Posts: 482
Re: Unable to change permission for external drive on ubuntu

Well after going through the issue i am suspecting that the USB stick is mounted as read only. You should use the following steps.
You should run below mentioned command to find out which device it is,
mount

after that you should unmount USB device by using following command.
Code:
sudo umount /dev/sdd1
after that check and repairs on USB disk.
Code:
sudo fsck -r /dev/sdd1
once done you should remove the USB drive and put in back on the pc, see whether mount is read or write.
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  #4  
Old 02-01-2012
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Join Date: May 2008
Posts: 246
Re: Unable to change permission for external drive on ubuntu

Make sure that USB driver or external hard drive should not use FAT32. In fact FAT32 is not having all the permissions settings for the Linux based fie system.
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  #5  
Old 02-01-2012
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Join Date: Jun 2011
Posts: 380
Re: Unable to change permission for external drive on ubuntu

In this particular issue I recommend that you should edit the fstab. If you are looking to mount the driver of yours with the write permission then you will need to unmount the drive. By simply right click on the driver and click on Unmount. Or you can do ?umount '/media/Expansion Drive' once you have done with the same you have to mount the drive by using following command.
Code:
mount -o rw /dev/sd.. /media/External_drive
also you should create a directory by using following command.
Code:
sudo mkdir -p /media/External_drive
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  #6  
Old 03-01-2012
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Join Date: Aug 2011
Posts: 306
Re: Unable to change permission for external drive on ubuntu

You can also use following solution to fix the matter of yours.
Code:
mount -o uid=username,gid=groupname /dev/sdc /path/to/mount
after that you should run below mentioned command.
Code:
chown -R user *
chown -R user .
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