Me again. I tried now more than 10 times to start a TM Backup on the WD 4100. None worked. It copied a few GB then terminated. The drive then is usually lost in the drive list of finder. Sometimes I had to restart the device manually (disconnect power).
It is a mess. I have this device for about six months but it is still simply not working properly.
Easier to force an infinite DHCP lease/timeout or static IP on your router’s DHCP server. Saves all the tedious mucking about with subnet mask/gateway IP/DNS settings.
I get no error messages, the drive simply vanishes from the list of devices. I have a home network with all static IPs. But I´ve not only probs with time machine. So about every 10 days the drive says “Bye bye” and I have to disconett from power supply. I contacted support in this case, they suggested to use the other power connecter, which died not help. No I´m living with this, it is not very satisfactory.
I tried it wireless, most times this does not work. By the way: no problems with wireless backups with my Synology device. I stopped trying with wd4100.