Should be good quality
The MEI RA1 (001) and the MEI-RB1-001 are definitely Panasonic disks made in Japan.
Panasonic LM-BR25MDE / 6x / Japan / 2011
MID: MEI RA1 (001)
Panasonic LM-BR50MDE / 6x / Japan / 2011
MID: MEI RB1 (001)
Apparently Digistor switches their disc providers every so often. Started out using TDKs, then went to CMC Magnetics, now apparently using Panasonics. At least they went in the right direction....the Panasonics are typically one of the best higher quality discs.
I would expect that you should get Good quality burns from those. I personally do not have any of those, so I have never tested them on my Pioneer Burner or quality scanned them with my Lite-On so I can not really say. You will have to test them as best you can and see what results you get.
The OPC setting is ONLY for 'Burning' discs and should not have any effect as far as scanning them goes. Scanning is just reading the disc.
As to the setting the OPC On or OFF, I don't think that 3dman7 and I really disagree overall. We just have slightly different opinions maybe about when it is needed. I think it should be left OFF, unless you absolutely have to have it on to make burning a disc work. It can cause other problems including lower quality burns if you do not need it ON. That is why ImgBurn intentionally defaults it to OFF and that has been my experience too.
If the Hp Firmware update will not install on your rebadged Lite-On, you may want to give the Dell Firmware update that I pasted the link to above a try. But you should really just look at what firmware it has in it already. You should be able to see that with either ImgBurn, or the Opti Drive Control program.
