11 Dec
2025
11 Dec
'25
9:33 a.m.
On Dec 10, 2025, at 8:02 PM, Kurt Nowak via cctalk
<cctalk(a)classiccmp.org> wrote:
Hey all -
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
copied the data. 4 of them have a broken metal access door. I opened one of
the broken ones (in a clean of an environment as possible) to see what was
going on inside. It looks like the door is held on by plastic divets that
have broken off. They might be able to be repaired with small screws. I
have no idea if these are functional or not. I am offering them up for free
for anyone that can use them. I'm willing to ship or you pick up in San
Diego.
Here is a link to photos of them:
https://drive.google.com/drive/folders/1wnzqjAtiq44MGU-wDJR-AQdzu-Mkyii8?us…
-Kurt
They look like 12 sector packs, so while they probably are not RK05 formatted given IBM
ancestry they would likely be useable in an RK05 drive. The "access door" is
just a shutter for the air inlet, to keep the dust out. If the door is missing the
platter isn't as protected but would still be useable. That assumes of course that
there is no contact between door and platter when the pack is installed in a drive.
If I had an RK05, or a 360 model 44 :-) I'd be interested.
What system were these used on? I see a label that says "1130".
paul