umount /media/sda1
This makes sure that the drive is unmounted. It may generate an error if the drive is not mounted,
but that is ok.
mount -o rw /dev/sda1 /media/sda1
This will mount the drive as read/write, while the umask=000 options allows all users to read,
write, and execute files on the media.
umount /media/sda1

+Darren Dalasta