Choose "reinstall" with all drives connected, then try to find NAS with Synology Assistant. Worked for me, but not with 6.2 installed. Perhaps it is not a bad idea to prepare quite new USB stick with 1.02b Jun's loader... With different MAC and SN.
Versuche es neu zu installieren via bootloader menu (reinstall in console, grubmenu). Überprüfe es, ob Synology Assistant kann die VM finden und versuche manuell laden die richtige *.pat hoch - für meine VM das ist DSM_DS3617xs_15284.pat.
At home:
Jun’s loader: v1.02b
HP Microserver Gen8
Intel Celeron G1610T
8GB RAM
4x2TB HD
Volume RAID5 Btrfs
DSM: 6.1.6-15266 Update 1
And some virtualized DSM's on ESXi 6.0-6.7.
Some clients with RS815+, DS918+ and smaller too.