For the data partition, which is the important one, the last items are:
vfat defaults 1 0
... from memory I'm afraid, because I have managed to cripple my Salix (it can't find its /home partition) through fiddling with another problem, and was only able to access /etc/fstab through xterm.
This permissions problem sounds like a matter of general linux knowledge rather than a problem specific to Salix, that is, it's probably something I ought to know
Looking at
http://en.wikipedia.org/wiki/Fstab
I'd guess I should edit the file to replace 'defaults' with some other settings including rw? user?
I'm puzzled by the setting for dump-freq, but imagine it has nothing to do with permissions.