not able to write to vfat partition with non-root id

rajeev1982 · 08-03-2006, 06:30 AM

Hi All,
I have FC5 installed on my Dell Inspiron 1300. I have a FAT32 partitions which I want to share between windows and linux. From linu, I am able to read and write on FAT32 partition with root userid, but not with anyother userid. If I try to write from anyother user id I get error "Permission denied". Please let me know how to make it writable for other users. I tried to change the permission for the direcotries but no luck, I am not able to do so.

Thanks in advance,

kstan · 08-03-2006, 07:16 AM

add this entry in your /etc/fstab

/dev/hda5 /data vfat defaults,uid=user1,rw

change /dev/hda5 to match your fat32 partition, user1 to your linux username
It should work well

b0uncer · 08-03-2006, 07:19 AM

One could use umask= in place of uid= too, but if uid= works, it might be better stick with it. I've only used umask= so I can't tell the exact difference between these two..

Petrous · 08-30-2006, 03:05 AM

Hello,

I have the same problem in FC5 : only root can write in vfat partition.

The proposed solution does not work for me : as root, I have edited
/etc/fstab and tried usmas=0 and uid=user : no effect.

Of course, I had done before chmod a+w on the mounting point : not applied!

Suggestion(s) welcome.

decrepit · 08-30-2006, 05:57 AM

I'm not in FC5 at the moment but in FC4 I've got
noauto,users,rw

I think I'm using the same in FC5

They're both writable by user, the only difference is FC4 mounts at boot and FC5 doesn't.

Petrous · 08-30-2006, 02:27 PM

I found the solution at bobpeers.com :

/dev/hda2 /mnt/fat vfat auto,rw,uid=0,gid=500,showexec,quiet,fmask=117,dmask=007 0 0

the parameters are explained on bobpeers.com

rajeev1982 · 04-15-2007, 01:45 PM

I have tried

/dev/hda2 /mnt/fat vfat auto,rw,uid=0,gid=500,showexec,quiet,fmask=117,dmask=007 0 0

and lots of other things also, but did not work. can anybody tell me some solution to this.

Thanks

homey · 04-15-2007, 03:01 PM

Since you have few posts and maybe kind of new at linux, I won't assume that you realize the obvious for me.
In the example that was given, they used the partition of /dev/hda2 and a folder called /mnt/fat. You need to make any changes to work for your system.
For example, I made a vfat partition /dev/sda6 and a folder called /mnt/test
Redhat / Fedora makes the first user with user id of 500 and group id of 500 . You can verify that by running the id command:
For example: id fred
uid=500(fred) gid=500(fred) groups=500(fred)

If you want more users to access the vfat partition, it's easiest to make them part of the same group when they are created.
For example: useradd -g 500 tim

Now, as root user, I can add an entry in /etc/fstab.

Code:

To make it writable for users with a group id of 500, edit the /etc/fstab file to include the following line.
 /dev/sda6 /mnt/test  vfat gid=500,umask=002 0 0

To make  complete control for users with a group id of 500, try something like this in the fstab....
/dev/sda6 /mnt/test vfat gid=500,umask=000 1 0

To give one user complete control of that directory, try something like this in the fstab....
/dev/sda6 /mnt/test vfat uid=500,gid=500,umask=000 1 0

Don't forget, those are examples and you need to use the correct partition name and folder name.

Jongi · 04-16-2007, 09:53 AM

One thing you might want to do is run a chkdsk <drive:> /f on your FAT32 partition in Windows. I seem to remember that fixing the same problem I once had.

I think the equivalent linux command is: fsck.vfat -a <partition>.

kstan · 04-22-2007, 09:30 PM

rajeev1982

the uid must equal your username or userid in /etc/passwd. Please make sure. uid=0 is root uid not normal user.

Good luck,
Regards,