Hello!
I have an issue that is making me bald at the moment...
First of all, my config and procedure:
HP N54L with modded bios (worked great with FreeNAS for a year)
Using only onboard LAN
Jun's Loader v1.03b (model DS3615xs)
5 SATA harddrives plugged in
I followed the excellent guide by Polanskiman, created the bootable USB stick and booted up the HP box. Synology Assistant found the unit, and I applied the DSM patch file DSM_DS3615