My Mac: G4/400 • 960MB • 2x40 GB Internal HD • 80 GB External (Firewire) • 160 GB External (USB 2.0) I installed a Sonnet "Tango 2.0" USB/Firewire Card to drive the new 160 GB HD. On startup (or wakeup from Sleep) I get the black square that says I must restart my computer (in about five languages.) Things work OK if I restart with nothing plugged into the Sonnet card. After startup, I can plug in the USB 2.0 HD and it works fine. Any ideas? I have sent this same note to Sonnet, but no reply yet. Thanks! earle *