Ext. HD turns off intermittently.

[bryant]

I have two 500 GB seagate ext. hard Drives.

They are about 8 months old.

What happens is intermittently they just seem to shut themselves off. However, they easily turn back on,but may do it again afterwards.

During an afternoon wedding yesterday, one of the HD's just turned off while I was using another DJ program for dance music, got a bunch of errors, then managed to get the HD back on. This happened three times, and the third time it took a while to get the HD back on.

What gets me is that it happens on both HD's and they are using two different power cords, too?

Anyone have any idea what's going on.

When they're on, they work fine as retrieving songs and data, etc.