2026-09-30 10:21 UTC
dd is neither the best nor a suitable method (dd is a scalpel not a shovel, use cp or cat). But optical media are tricky either way. redumper was made for a disc preservation initiative.
Replies (2)
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@H0NEYB3RRYGREEN23@lemmy.ml 2026-09-30 22:35
Thanks for mentioning redumper. I’ll check it out. In your experience, after completing the disk dump with redumper, did you have a method to verify the copied data matched the original exactly?
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@WarmApplePieShrek@lemmy.dbzer0.com 2026-10-01 14:37
Optical media don’t even have a bitstream. When you dd from something other than a CD-ROM, it’s not clear what you’re getting. You might just get an error saying it’s not a CD-ROM. Different kinds of CDs use completely different encoding layers in between “the bitstream” and the actual pattern of dots engraved on the disk. Obviously a CD-ROM has “a bitstream” because it’s designed purely for computer use, but for other kinds it’s not so clear.