What is the maximum number of external harddrives?

I've got about 1600 DVDs and I've started ripping them to an external hard drive (just my favorites) for viewing through iTunes and my AppleTV. Well, my wife thinks its wonderful and wants to put them all on the machine (comes to about 4Tbytes). Is there some limit to the size/number of external harddrives that I can connect to my iMac? By the way, this really rocks as a way to watch movies!
Any help is greatly appreciated.

If you're talking about USB drives, you can have a maximum of 127 drives (although your system would likely come to a halt long before that limit). For a chain of Firewire drives, you can have 63 drives.
Bear in mind that you will need separate power for chained devices; you would be able to attach one small USB/Firewire drive powered by the computer, but no more than that.
Matt

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