I had a Seagate 400gb external, via USB, online for ?2 years?
I added a Seagate 750gb external, Firewire400, several months ago.
Both drives are IDE.
Over the weekend, the system bogs down, almost dosen't respond and neither external drive shows or is accessible. Unplug the 2 externals and the speed and response are normal and all other components seem ok.
Spybot, Ad-Aware, Norton, Defender and Stopzilla run 24/7. None have found an issue.