Hey, the 1912 looks more like a Samsung drive than a Toshiba drive.
Also on their site, they say something about the SD-R5002, but it seems that information is over a year old? http://www.tsstorage.com/info/5002_6012j.html
What does it say?
Like many other TSST ODD drives, the design inside is mostly Toshiba and the design outside is mostly Samsung.
Both TS-H552B and TS-H542A look exactly like Samsung drives. They don’t look like Toshiba drives at all. However, the internal mechanism is almost that of Toshiba though it’ll change over time because Samsung will try hard to use more of their own components in TSST products.
I also have SD-R5002 and I don’t think there’s much to say about the 2x-only writer. It’s a good drive to burn Taiyo Yuden 2x DVD-R media though.