Some months ago I posted that my Firewire 800 port was dead on my iMac.\nAt the time it was serving my dual disk iOmega drive. I tried using\nit with the Drobo, and that wouldn't work either. New cables. Etc. and\nso on. Dead Jim.\n\nI just had a thought: what if it was some bizarre configuration issue,\nand installing Lion cleared that up?\n\nTried it. Works.\n\nSo whatever caused the FW800 to "die" was not hardware, but something\nunreported, unlogged, undiagnosed in the system somewhere. Installing\nLion possibly cleared that up.