chown on /media/foo not permitted as root!

[biggerben]

I have a fstab-mounted /media/backup (ext4) and an automounted /media/external (FAT32)
I recently gave my roommate an account on my box, and don't want him to have access to either one, or my /home (obv).

I changed options in fstab to defaults,utf8,umask=0000,uid=1000,gid=1000, is that correct?

I chmod'ed my /home/me to 700.

I tried to chown /media/external to me:me, but get the error
chown: changing ownership of `/media/external': Operation not permitted


first: how do i fix that last error (it's auto-mount, so i can't do anything in fstab!)
second: is everything secured like now? will it still be after a restart?

[bodhi.zazen]

Your umask value is wrong and you can not use chown or chmod on FAT or NTFS partitions.

Try umask=077

[biggerben]

Your umask value is wrong and you can not use chown or chmod on FAT or NTFS partitions.

Try umask=700


Uh, you mean 077, right?

[Nepherte]

Yes, he probably does.

[bodhi.zazen]

Ooops ... Fixed my post