Possible error in HDD with external vibrations?

Hello!! I've an Imac I7, 2.8ghz, 16 RAM and an Imac i5, 2.8ghz and 8 RAM, then a MOTU Ultralite audio device and a RME 802 audio device. I'm running QLAB in a dinner show where we use a lot of Sound Pressure Leve and I have a lot of vibration on the imacs (subs, etc). The problem is sometimes the music stops about 1-2 secs and the log says: audidevide did overload. I've been looking what it means and it's said the audio device is ready to receive the audio but the computer could not deliver the audio in time.... Anybody can help me? do you think it's possible by the vibrations? What else can be? I've tried to toogle the imacs, the audio devices.... etc..... and the same.... I'm crazy looking for resolve it!!

Thanksss