Thanks for all the info, especially info on the spring loaded access door. The vacuum venting makes sense but I'm still perplexed as to how the read/write head gets access to the magnetic surface. As I stated in my original posting, 4 of them seem to have broken off. Do you think it's best to open the rest of the broken ones up (in a very clean dust free area) and remove them or leave them in there flopping around risking damage during transit? They are pretty easy to open up.I was thinking of carefully taping shut the opening with masking tape and a small patch of plastic.
Also, they have been claimed already, sorry. A portion will be donated to CHM. -Kurt On Fri, Dec 12, 2025 at 12:33 AM Christian Corti via cctalk < [email protected]> wrote: > On Wed, 10 Dec 2025, Kurt Nowak wrote: > > I came across a big box of 12 of these disks which my dad acquired > through > > work back in the 70s, and squirreled them away in the attic after they > had > > These are disk cartridges from an IBM 1130 system. > > Christian >
