I found a new Fugitsu MHV2100AH 100 GB hard drive on eBay and the guy accepted my "best offer" of 50 bucks. It came today and I plugged it into my T43 2668 46U, crossed my fingers and hit the power button, no 2010 error!
My question, should I make the bootable cd with the fwhd55.iso utility and run the firmware check? or leave the sleeping dog alone?
Just let it go as is - I've been running the 120gb version for months without a problem. Got a spare 100gb coming from the same source as yours - $48 best offer.
Thanks John, I'm using the T43 for this reply, no problems and no reason I can see to run the firmware updater. The performance is rather crisp as it is.