Greg,
Here's the post I was referring to:
http://www.nikonians.org/forums/dcboard.php?az=show_topic&forum=198&topic_id=3870&mesg_id=3870&page=
And the text in case you're not a nikonians.org member,
"Super Coolscan 9000 ED - Technical Bulletin"
Nikonians,
I purchased a Nikon Super Coolscan 9000 ED scanner from ePhotocraft.com.
I started doing a large series of batch scans. During the scans I started having a problem with the scanner. It would scan maybe two out of five of the slides, give me a scan error, and then report that the scanner was not powered up. I had to reset the scanner to get the slides out of it, and get it working again.
I called Nikon USA tech support to discuss this issue. And an individual named Harold helped me. He had me run a test on the scanner by powering down my computer and the scanner. I then turned the scanner back on and noted what it was doing. The normal startup procedure is for the scanner to blink "once per second" for a couple of minutes while it performs an internal system test. If you look in the little door, you will see the LEDs changing colors as it cycles through the test.
My scanner passed the self-test by completing the cycle without changing the blink rate from once per second. At the end of the internal test, the light goes solid green, and it is ready to scan.
So, since my scanner passed its own self-test, the Nikon technician asked me about the firewire card installed on my computer. He said, "Did you use the firewire card supplied with the scanner?" I had not done so, but instead had used the current firewire card in my computer. He asked me what chipset the firewire card uses, and I reported that it was a Texas Instruments (TI) chipset.
At this point he said..."most likely that is your problem." He said that they were having difficulty with TI chipset Firewire cards, and so had decided to supply a firewire card with the scanner to keep from having the very problem I was experiencing. Evidently, the scanner was developed and tested using an NEC Chipset firewire card.
So....if you buy a Nikon Super Coolscan 9000 ED scanner (LS-9000), USE THE FIREWIRE CARD SUPPLIED WITH THE SCANNER!
At the very least, make sure that your firewire card does not have a TI Chipset.
The Nikon supplied card has two external firewire ports and one internal port. If you need more expansion, you'll need to buy a firewire hub for your other firewire devices. Nikon did NOT recommend running the scanner from a hub, so use a direct port for your scanner. It probably won't damage the scanner, but may have communications problems, resulting in scanning errors like mine.
For those that need it, Nikon's USA Technical Support Number is:
1-800-NIKON-UX, or 1-800-645-6689.
End of Bulletin...
However sounds like you have a good handle on the situation. For myself, if I have a choice, I'll get one with the card.
Mark