I used this process and it worked. It really is not difficult, just follow the directions. Drives are up and working better than ever, but I am not using them as media servers.
All users of WD MyBook World Edition II (white light) have problems with firmware 1.1.16 and 1.1.18 with freezing the device and WD won’t help them to fix this BUG and release new firmware. The problem is in Twonky and Mionet. I communicated more then two weeks with WD Support and they ignore our problems! Somebody closed the problem Drive Becomes Un-Accessible After short use , however it was not solved.
Here is an update guide from dzentai how to fix this problem till we are waiting 9 months for new firmware which should fix this BUG permanently.
In the web configuration switch to Advanced Mode, then on the System tab using the Advanced button check the SSH Access checkbox on the top of the page, then Submit.
Using Putty or any other SSH client connect to your NAS’s IP address, and log in using “root” as username, and “welc0me” as password!
Now you are inside your NAS.
Type the following on the prompt (this will move/save the startup scripts to the /root/ folder and disable running of mionet and twonky main program and miocrawler it is unnecessary):
mv /etc/init.d/S9M_mionet /root/
mv /etc/init.d/S97twonkyserver /root/
mv /usr/mionet/bin/cvm /root/
mv /usr/mionet/changeNotifySocket /root/
mv /usr/mionet/plugin/miocrawler/miocrawler /root/
then reboot your NAS with