I have a SSD with Mint 18 installed on it and a HDD with with a old version of Mint. My question is does it matter that the SSD is labeled sdb and the HDD is labeled sda? From what I have been reading the SSD should be labeled sda because it is the primary drive and the HDD should be sdb meaning slave. Can I change the label in the disk utility or do I have to reinstall Mint? Also do I need a UEFI partition and should the home partition be NTFS instead ext4? Sorry for all the questions and thanks for the help.