Since these days I have troubles with the sutpid "Green" technology from Western Digital, I made some check on my servers and find on some of them more GREEN Drives. I tried to disable idle3 state on some of them, but unfortunately it just does not work for some of them.
For example on:
WD10EACS - 1T Standard edition
WD1000FYPS - 1T WD RE2-GP
On the above drives I was unable to disable idle3 state.
wdidle3.exe gives me something like: idle3 timer set to 6500ms. No matter that one of them is RE edition. I suppose it uses some old firmware. I will try to get the latest firmware from WD.
The program does not care that I pass the option for disabling the timer. The only good thing in this case is to increase the timer to maximum value
Actually from the HDDs I have tried to play with, the only one which actually agree to disable their timer were WD 2TB RE4 model: WD2002FYPS
Conclusion: DO NOT buy GREEN HDDs for servers. They will screw you.