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Old 06-21-2008, 04:42 PM   #1
rc nai
Registered: Jun 2008
Distribution: Slackware 13.37,14
Posts: 73

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Post Change Permissions For Read-Only Filesystem

Kinda stuck on this and it's confusing me. I'm trying to transfer a text file into my usb flash-drive with mc(midnight commander) but it said that it's a read-only file system. The usb flash-drive is mounted on /mnt/memory. So now I'm trying to change permissions for /mnt/memory to have rw access. When I do this:
# chmod u=rw memory/
I get this:
chmod: changing permissions of `memory/': Read-only file system
The output of ls -l:
dr-x------ 1 root root 12288 2008-06-19 22:57 memory
The output of fstab:
cat /etc/fstab 
/dev/hda5        swap             swap        defaults         0   0
/dev/hda2        /                ext3        defaults         1   1
/dev/hda6        /usr             ext3        defaults         1   2
/dev/hda7        /home            ext3        defaults         1   2
/dev/hda1        /fat-c           ntfs-3g     umask=077        1   0
#/dev/cdrom      /mnt/cdrom       auto        noauto,owner,ro  0   0
/dev/fd0         /mnt/floppy      auto        noauto,owner     0   0
devpts           /dev/pts         devpts      gid=5,mode=620   0   0
proc             /proc            proc        defaults         0   0
tmpfs            /dev/shm         tmpfs       defaults         0   0
The filesystem is /dev/sda1 and mounted on /mnt/memory type ntfs (rw)

I'm not sure where to go from here.
Old 06-21-2008, 05:10 PM   #2
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You should mount the drive using the ntfs-3g type if you want to write to it. The following command should mount the device appropriately:
# mount -t ntfs-3g /dev/sda1 /mnt/memory
This will only be writable by root, however, because of the way ntfs-3g is setup. If you want it to be rw for all users, you would have to set the setuid bit. I don't have any ntfs-formatted devices to test that on, so take my advice with a grain of salt. A search in these forums for ntfs-3g should yield the answer you seek.
Old 06-21-2008, 06:20 PM   #3
rc nai
Registered: Jun 2008
Distribution: Slackware 13.37,14
Posts: 73

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Yea that worked out.

...and for users to have rw, I think it would be like this:
/dev/sda1 /mnt/memory rw,users,umask=1000


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