Indeed it is possible you need the below loader (added drivers for hp microservers) and select Force install this will show the device on network then do the update/fresh install and select the DSM 15047 once it reboots select the top option (dont have to select amd option) and you should find your hp server is now on version 6.1 and fully working
Loader: Click Me
Please disable C3 in bios as it causes issue with installation/running 6.1
Known issues: sometimes after install the login page will not recognise your username/password
Solution: before update enable admin account with a password you can remember and login via that