[Update 2: this was a very broken file. It has been dumped again]

[Solved, thanks to @futzle@old.mermaid.town and an old... Dreamcast tool?!]

https://github.com/bootsector/dctools

--

anyone seen files like this?
[screenreader users, this post is probably unfriendly]

I was handed what should be an ISO file.

00ff ffff ffff ffff ffff ff00 0002 0001 is tickling my brain like the start bytes are doubled?

I can't find CD001 in here so maybe it's not ISO9660 at all?