My contribution is to correct the script :
there is a mistake etcs/ instead of etc/ :
if grep -q "eth4_mtu" /etc/synoinfo.conf; then
sed -i '/eth4_mtu/d' /etcs/synoinfo.conf
fi
into
if grep -q "eth4_mtu" /etc/synoinfo.conf; then
sed -i '/eth4_mtu/d' /etc/synoinfo.conf
fi
-Install 1515+ .
-Then rewrite synoconf.info.
"sudo sed -i 's/unique="synology_avoton_1515+"/unique="synology_avoton_1517+"/g' /etc.defaults/synoinfo.conf"
-Without restart, the web info panel should show 1517+
- Manually update 1517+ pat file from web interface.
If you managed to update the bios to M.911, you should be fine.
I noticed that the
"cat /sys/devices/virtual/dmi/id/bios_version" command gives the old M.111, but the bios update sees it as M.911.