Post #1039190

2026-04-09 10:25 UTC

[Update 2: this was a very broken file. It has been dumped again] [Solved, thanks to @futzle and an old... Dreamcast tool?!] https://github.com/bootsector/dctools -- #AskFedi 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&#39;t find CD001 in here so maybe it&#39;s not ISO9660 at all? #DataPreservation #Archival

Replies (4)

@voltagex@aus.social 2026-04-09 10:33

past Adam needs to keep more fucking notes. I know I have seen some of these patterns before. I need a search engine that just searches in hex bytes.

Open ##2028692
@kauer@aus.social 2026-04-09 10:42

@voltagex Does it mount OK?

Open ##2028694
@futzle@old.mermaid.town 2026-04-09 10:54

@voltagex It sorta repeats from 0x930, that’s 2352 bytes. Hmm. Does that repeat throughout? I thought it might be a packet capture format but it doesn’t really line up.

Open ##2028697
@abrasive@digipres.club 2026-04-09 11:53

@voltagex @futzle I hope this isn't telling you stuff you already know but for future reference - that's a raw 2352 bytes per sector dump, yes; the first 12 bytes are the sync header (00 ff ff ... ff 00) then there's a BCD timecode (00:02:00, first sector of the first track) and then the 01 indicates it's a Mode 1 ie. normal data track, with 2048 bytes of data I deal with this a lot, so here is bin2iso.py which lives on my PATH, use it as `python bin2iso.py thisfile.bin outfile.iso`

Open ##2028704