Since we last corresponded I switched to using a wireless adapter from Alfa and it increased the wireless performance to 8MBps which when you think about it is actually quite fast. I have also tried a CAT6 cable instead of wireless and the backup performance peaked at 23MBps which is perfectly adequate for my needs. However, I want wireless operation so cables are out. The Alfa is a 2000mW adapter and has high power and sensitivity. There are several walls between me and the router but using the Alfa I get 100% signal and 100% quality. Yet it is still not as good as an Ethernet cable which is an interesting result.
My temporary substitution has proved one thing, the backing up problem is still present so I guess I can rule out wireless being the cause of the TM backing up problem. I now know I can backup faster using the Alfa and CAT 6 cable if I wish.
I went back to WD Support and provided them with an update. I now have around 430GB to backup using TM but my backup has now reached 765GB and still going!!! WD Support’s advice is to let the backup continue and report back to them what happens. Will the backup continue until it fills the whole 3TB? I would love to know what it is that’s being backed up.
I have noticed something else (I think). Before I converted to RAID 1 I wasn’t aware of any comms problem with the NAS. Now, everytime I launch the WD Dashboard I am getting the warning ‘Network link down, the network link is down or has become intermittent, Please check your network connection.’ I always close the warning window rather than suppress it which is the other option. But in using the WD Dashboard I have yet to encounter any problems with it. The WD Dashboard and NAS apparently communicate just fine. If there was any ‘intermittency’ I feel sure I would sense it. Is the warning an accurate reflection of a communication problem or is it false and possibly related to my backing up problem?
I have also successfully shutdown the NAS via the WD Dashboard and performed a reboot using the reset button on the NAS and monitored the lights front and back before, during and after the reboot. Everything is normal.
I am wondering if something unexpected happened when I converted from RAID 0 to RAID 1. Something that even WD is unaware of - a bug in the firmware!
I am coming around to the view that I might go back to RAID 0 (factory default) and repeat my tests. I cannot put my finger on the problem but the NAS is the only new component in the LAN and the problem manifest with its installation.