I have an issue with a Western Digital "My Book Live 2TB" NAS drive that I am trying to setup as a Time Machine backup. The My Disk Live is connected to my Airport Extreme and my Macs are connected via Wifi on 5ghz. The Western Digital forums are FULL of people having the same problem as me but there seems to be a general lack of knowledge regarding OSX and no fixes have come to light.
First, the good part: The drive supports Time Machine out of the box and the Time Machine system preference panel sees the drive and accepts it as a valid backup drive.
Now, the ugly part: For a 350gb backup, Time Machine states that the backup will be done in approx 3 days. When I use Activity Monitor to check the copy rates when on Wifi, they peak at about 5mb/s (understandable) but they AVERAGE under 100kb/s. When connected to my APE with an ethernet cable, my speeds peak at aroun 10-12mb/s but still, they average a snail like 100-200kb/s.
Over the course of 24 hours, I was able to copy a whole 40gb's when connected directly to the APE with the ethernet cable.
The funny part is this: When copying a normal file or folder from my MBP to the MDL over Wifi, the speed holds steady at approx 5mb/s through the whole transfer. I can copy a 10gb file in approx 30min. When connected via ethernet directly to my APE, the speeds for a normal file transfer to the MBL are approx 10-12mb/s at a constant rate. When reading files off either of my MDL's, speeds are generally quite good as well and allow for streaming of HD content without inturuption.
I have tried creating a Time Machine Backup on my other Mybook Live with identical firmware and the result is the same. I am assuming, simply because copy speeds are very consistant and fast (relativly speaking) when copying files normally, that the issue resides within Time Machine itself which leads to the question: Why does OS X 10.8.2 copy files at a decent speed over both Wifi and ethernet, yet when using Time Machine, copying to the SAME drive, I'm looking at the better part of a week to get my backup done.
Also worth noting, my Time Machine backups to an external USB drive are faultless and fast. No issues what so ever.
For those who are willing to help me out, here are some details:
-Macbook Pro 13" (mid 2010) with 10.8.2
-Apple Airport Extreme 5th Gen with firmware 7.6.1 connected with 802.11n 5ghz.
-Western Digital My Book Live with firmware 02.32.05-046
Any help that is offered is very much appreciated! Thank you in advance,