I was able to manually build a 120 GB drive and then I used the Big Disk Builder program for 5 other drives ( I have 3 Mk2s with 2 each 120 GB drives in them).

I have had success with both Hitachi and Toshiba drives. I have not mixed vendor drives in a Rio.

The builder works very well, good work.

Thanks
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In SI, a little termination and attention to layout goes a long way. In EMC, without SI, you'll spend 80% of the effort on the last 3dB.