how to make usb mounted folders write permission?

padoor · Advocate Joined: 30 Dec 2005 Posts: 4185 Location: india

when i plug in usb hdd the partitions are all mounted in /media not writable. ntfs,ext3 parts.
i cannot copy /move files to /media mounts.from internal hdd
this is in gnome desktop.
any help ?
in windows i am able to do it. it is not sharing problem
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ASID · Apprentice Joined: 22 Mar 2006 Posts: 195

Does your user belong to plugdev group?

For ntfs is a little bit trickier. You should have something in your fstab like the following:

padoor · Advocate Joined: 30 Dec 2005 Posts: 4185 Location: india

/dev/sda1 and /dev/sda2 are ntfs and mounted with ntfs-3g in fstab.
there it works correctly and i can read write execute files.
only when a usb hdd is plugged in the problem starts.
mounting and copying from usb partition works but other way no.

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ASID · Apprentice Joined: 22 Mar 2006 Posts: 195

Hmmm, then it's just a matter of configuration.
Since you are on gnome I guess you use gnome-volume-manager to automount your usb. It gets additional options from the /system/storage/default_options/$fstype$/mount_options key of gconf.

You can try the following:

padoor · Advocate Joined: 30 Dec 2005 Posts: 4185 Location: india

it does not help in mounting read write mode.
not able to write to usb drive.
permission is only for reading. it does not change with properties adjustments.
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padoor · Advocate Joined: 30 Dec 2005 Posts: 4185 Location: india

even as root login the usb drive partitions are mounted in read only mode
root also cannot change the permissions.
by the way i tried in ubuntu-10.10 installation there it works fine. i can write to any usb partition.
help needed , i cannot backup any files to usb hdd now

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ASID · Apprentice Joined: 22 Mar 2006 Posts: 195

Can you post the /etc/mtab ?

VoidMage · Watchman Joined: 14 Oct 2006 Posts: 6196

Gnome stopped using gnome-volume-manager to automount awhile ago.

briancarden0 · n00b Joined: 05 Jan 2011 Posts: 1 Location: Nashville

To enable everyone rw access, the key is umask=0 option to mount command.

sudo mount -o umask=0,uid=nobody,gid=nobody /dev/something /mnt/somewhere

umask=0 is enough, uid and gid just for sake of clarity, so you don't see more 'root' owners than necessarily.

VoidMage · Watchman Joined: 14 Oct 2006 Posts: 6196

I'd say 'nls=utf8,fmask=111,dmask=0' is a better set for kernel ntfs.
For ntfs3g,there's no nls=utf8 option, but the other two are correct.