in worst case you can try the procedure to prepare a new HDD, which i would recommend anyhow, this because if you are stucked with 3.0 because of small system partitions then still you don't have much gained and you can not upgrade to the newer versions. for that repartitioning of the disk is required in the case of too small system partitions.
In the download section you can find all data and files to prepare a harddisk (for instance see sp8020 10-1 firmware topic)
the ip scanner I posted is for windows OS