Well – at this point I’d be happy with RGB transcoded to YUV422 in both DNxHD and uncompressed. I suspect the data-rate of 10bit RGB444 is the problem for a single ‘average’ SSD.
I was actually looking at using it as a standalone recorder to archive dozens of hours of SD video tape transcoded to 576i HDMI. But of course my various transcoding gadgets all output in RGB.
The nice thing about that setup being I can just hit play and record and leave it running while I’m working on other stuff. When the tape runs out, swap drives, swap tapes and continue.
Quietly hoping that it will get fixed.