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I used Disks tool to make an image of a partition:

Create Partition Image

Then tried to mount it with Disk Image Mounter:

Disk Image Mounter

I enter my password twice:

add loop device mount loop device

Then it fails with this error message:

Unable to mount OLD SYSTEM_DRV

Error mounting /dev/loop1 at /media/endolith/OLD SYSTEM_DRV: Command-line `mount -t "ntfs" -o "uhelper=udisks2,nodev,nosuid,uid=1000,gid=1000" "/dev/loop1" "/media/endolith/OLD SYSTEM_DRV"' exited with non-zero exit status 21: ntfs-3g-mount: mount failed: Permission denied

Why is permission denied and how do I fix this?

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  • Try sudo chown 1000: /media/endolith/OLD SYSTEM_DRV. Note that the folder must exist already. – mook765 Oct 4 '16 at 6:44
  • @mook765 Hmm, it doesn't exist. I get asked for my password twice, actually. Once for setting up the loop device and once for mounting it. – endolith Oct 4 '16 at 23:36
  • @mook765 And if I create it and then try your command I get chown: invalid spec: '1000:' – endolith Oct 5 '16 at 1:10
  • OK, remove the created folder. The folder will be created automatically during mount and it seems here is not the problem. Please check the ownership of the image-file. Could be the problem that the image is owned by root. If that is the case change ownership of the file with sudo chown endolith:endolith /path/to/your/image_file. (I see, chown-command doesn't accept user-id). – mook765 Oct 5 '16 at 10:56
  • @mook765 sudo mkdir /mnt/SYSTEM_DRV sudo mount -t ntfs -o loop "Disk Image.img" /mnt/SYSTEM_DRV works fine, for the record – endolith Oct 5 '16 at 14:31

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