5 minutes after booting, the device becomes mute: longer possible to access the Web interface and no way to see the disks in the provided utility. For cons, the discs are seen through Windows.
Admittedly two other devices do not cause this problem.
Also svoir good support online IOMEGA could not find me a satisfactory answer!
2012: Note that my printer is not recognized. I must die / reconnect the USB cable for it to be considered active.
2012 bis: a firmware update improves things slightly.