As once reported on some other forum which I don’t remember now, I had problem with my CRW-F1.
It wrote PSX backups which were supposed to be written at 1x speed in reality at 4x, rendering them sometimes useless for my old PSX, while they played perfectly in a PSone or PS2.
I found out, that the drive ignores speeds lower than 4x when using Verbatim SuperAzo media.
I didn’t test with other drives. Is this true for all brands?
I like Verbatim media, so I would resort to burning the backups on my old Sony CRX-120x (1-4x CD-R).
If those Verbatim discs cannot be written at 1x, I will not buy them anymore. A fast copy of a PSX game results in videos skips, slower loading and in extreme cases lockup.