I've lost the PSU for my Iomega Minimax 31734900. The sticker on the bottom says it needs 12V DC at 3A, but it's got the barrel type of connector and there's no polarity indication anywhere. I've Googled in vain for a user manual. Iomega was bought out by Lenovo and it now seems impossible to find any Iomega manuals on their site. Anybody got the same HDD and can check on the PSU to see what the correct polarity is?