SCSI Maximum Frame
F54000R looks to be guaranteed to work; however it isn't clear why this is happening. Possibly the player detects the maximum frame number when reading the lead-in, and won't accept a SCSI request for a higher number, or possibly it's just fixed to accept no higher if the disc is detected as an LV-ROM disc. All the LV-ROM discs I have contain exactly 54,000 frames so I may never know.