If your Mac suddenly looses Firewire devices, here's one cure...

Since we FCP people use a lot of external Firewire drives, this might be useful.
If your Mac suddenly looses Firewire devices, try this. (I got this from LukeA on the iLounge forums.)
Shut off your Mac for at least 10 minutes. Then reset the P-RAM (whatever that is) by holding these keys on startup: Cmd + Opt + P + R - until the Mac chimes a few times.
My Mac Mini suddenly stopped recognizing any external Firewire drives. I thought the port had probably blown on the computer, and was about to buy a new iMac, but I tried this as a last resort. It worked!
Now I don't get my new iMac! ****!

I got this from LukeA on the iLounge forums
Just so you'll know, Apple has a ton of articles and how-to's right on this website (just click the Support link above and do a search). Other common Firewire problems can also be addressed by resetting the PMU (Power Management Unit) button: http://search.info.apple.com/?search=Go&lr=lang_en&kword=&type=&newstype=&q=pmu
This one os specific to the MacMini: http://docs.info.apple.com/article.html?artnum=300574
-DH

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