logoalt Hacker News

fluoridationyesterday at 11:43 PM2 repliesview on HN

A reminder that CD-ROMs are pressed from glass masters, not burned like CD-Rs. I wonder if anyone has tried something like this with burned discs, though.


Replies

kevin_thibedeautoday at 1:03 AM

The multisession standard actually afforded the possibility of CD-PROM; a hybrid disc with a pressed read-only session followed by a writable section. It was only used for Kodak Picture CD (not the same as Photo CD) to hold software in the pressed session. It also apparently standardized a magneto-optical hybrid that never made it to market.

show 2 replies
ekelsentoday at 12:36 AM

Yes, my point, if the answer is that there is no way this works without every disc being different.

It was not possible to manufacture at the time at scale.

show 1 reply