I did mean -v, the above was a typo. cdrecord is just too finicky about the drive. I built xorriso from source and ran:On Fri 09 Aug 2024 at 18:49:39 -0500, Will Senn wrote:cdrecord v /dev/cd0d NetBSD-10.0-amd64.isoMaybe you copy/pasted this wrong here, but in case not: you probably mean "-v" instead of "v". That probably makes the remaining arguments misunderstood, and cdrecord probably now thinks there are 2 tracks to record, and complains about the unknown length of the first of those.Track 01: data unknown length Track 02: data 622 MB cdrecord: Track 1 has unknown length.-Olaf.