2 days ago I just bought my new Drobo (V2) incl. 2x 1TB WD Green HD’s (WD10EADS).
The Drobo is connected to a Mac mini with a FireWire 800 > 400 cable and placed in an open space.
The first thing I noticed about the Drobo is that the fan spins up very often. When I’m watching a movie that is being streamed from the Drobo the fan is on during 75% of the movie. It seemed to me that the fanspeed was not that high when it spins up to cool the HD’s, but the fan made an additional sound besides the “blow-sound”.
You can here some sort of a low-tone resonance coming out of the Drobo casing. The sound is hearable when the Drobo starts cooling and the fan spins up in what I think is the 1st or 2nd stage of the fan speed. When I boot up the Drobo the fans are also hearable but without the resonance and after a 1 minute or 2 the fan noise goes away. But the resonance is very annoying! The front-plate is attached correctly so I think that can not be the cause of the resonance.
I really don’t mind the fan spinning up but the resonance is driving me crazy. Also the fan spins up almost every 10 minutes. Even when the Drobo is idle and no data is being accessed on the Drobo.
Today I went back to the shop where I bought the Drobo (I work there too) and brought home our Demo/Store-unit. I put in the two WD drives and this Drobo makes the same resonance sounds, although it seems a bit less. The fan is also spinning up the same amount of times but “data protection is in progress” so this process may be causing the HD’s to heat up and the fan spinning up. But still the same annoying resonance sound!!!
My questions are:
- Are there any people experiencing the same “resonance sound”?
- Is there something I can do or you did about this annoying sound?
- How often does the fan spin up when you are watching a movie?