After trying out some of the advice from this and other forums, my T2 still didn't recognize the HDD.

Because the T2 is still under warranty I took it to a Yamaha authorized service center in the San Francisco area. The Tech at the shop concurred with what I have found; the keyboard will only recognize the HDD intermittently. The Tech then called Yamaha for support but Yamaha offered little help other than I should try using an IBM Travelstar (40GB) HDD.

After much calling on my part to YAMAHA and telling them that the installed HDD is in on the Yamaha recommended list and that it worked fine for about a month before the problem started, Yamaha finally offered to replace the computer board of the T2.

The new computer board will be installed next week and I’ll keep you all posted on whether the problem is finally fixed.

Joel