This is an INTERMEDIATE update of DSM. BE CAUTIOUS WHEN UPDATING TO DSM 6.2.1 with Jun's loader 1.03a2 or  1.03b or earlier. You may brick your box because of a change in the kernel config that breaks all non official PCIe devices drivers. This has been confirmed by Jun.    You have been warned.     https://www.synology.com/en-global/releaseNote/DS3615xs