My UJ273 is also made in Philippines, so it should be also a QSI.
It’s usually easiest to check the UL-file number to identify the manufacturer. UJ-273 was made by Panasonic itself:
E140407 can be searched in UL database
I’m not a total freak, but I haven’t heard of any blu-ray drives made by QSI (neither slim nor 5,25").
OK, thought Panasonic have stopped making optical drives long time ago.
And I have good experience with the reliability of Panasonic-products, but the drives in Panasonic DVD-Recorder (Standalone) were not very reliable.
My Pioneer or Sony DVD-recorders had much better drives IMHO
Writer: Pioneer BDR-212E
Media: Mediarange BD-R 25GB 6x
Burn Speed: 6x
Software: Nero 12
I´m far away
Well, from my experience write speed above 4x are not recommended for CMC on 209, 211 & 212 series drives, although I think that scan would look a bit better at 4x test speed, 8x on LiteOns seems to give more errors.
Mostly I burn 4x on BA5, maybe next time again