I did it.... from DSM 6.1 to 6.2 AND at same moment I changed with migration option from (older model) DS3615xs to (newer model) DS918+ (baremetal)..... I only use(d) a Raid 1 with two disks.   Call me stupid boy. It was risky my working productive system to change Model and DSM parallel but I´m lucky now. It was very easy with the right loader (thanks @jun 👍) and i had much luck/fortune😉.   Update succesful   The hardware (look at my signature) is the same as befor