Mounting a partition consistently every time can be a problem when dealing with removable media or after adding or removing a partition on your drive. These type of changes cause the device names to change on reboot as devices are rediscovered and renumbered. These issues are solved by mounting partitions by UUID rather than by device name. The UUID will stay the same for the lifetime of the partition.
A useful command to help you find the proper UUID is blkid.
$ sudo blkid /dev/sda3: UUID="3868B51068B4CDBE" TYPE="ntfs" /dev/sda5: UUID="65086436-bb2d-477a-ba83-46171f8091fe" TYPE="swap" /dev/sda6: UUID="0f0b40d3-7bd8-4cee-8f7a-4ab7ee567b4e" TYPE="ext4" /dev/sda7: UUID="98beaa74-34e5-4cee-94ac-234246d8ef33" TYPE="ext4" /dev/sda9: UUID="d7ca81a4-6422-4b0b-812d-605679858cd2" TYPE="ext4"
After finding the UUID, add it to your fstab. For example, to mount /dev/sda3 as /srv/ntfiles add the following line to your /etc/fstab.
UUID=3868B51068B4CDBE /srv/ntfiles ntfs defaults 0 0