It's a IBM 6580 Displaywriter System from 1980 with a IBM 6360 dual 8inch drive storing 2 x 1.2MB on two floppies.
@GoldenStar @nixCraft Up to 1.2 MB, for the later versions; same for 5 1/4'' diskettes. 3 1/2'' diskettes went up to 1.44 MB.
https://en.m.wikipedia.org/wiki/Floppy_disk
For comparison, a single photo taken by a mobile phone would have to be split into 4 or 5 diskettes to fit!
@nixCraft Until recently (like 5 years ago) the US military still used 8” floppies to coordinate nuclear lunches:
https://www.engadget.com/2019-10-18-us-military-nuclear-missiles-floppy-disks.html
@nixCraft I had a job for a summer back in the day repairing disk drives, albeit 3 1/2”. I had to align the heads with a special, very expensive disk with an analogue signal on it. I’d see some sort of measurement on the screen of the test PC, and I’d have to twiddle a screw on the heads to align them.
That was just at the cusp of it still being worth doing manually, and not just replacing the drive.
I can still smell the PC peripheral dust, no other dust smells like that.
Wonder whatever happened to all those floppies
Sigh… how time flies…
8" floppies were in fact so floppy that if the slot were horizontal you needed two hands to insert them. I never worked with those other than seeing them used at customer/suppliers of my first job.
The 5.25" floppies were less floppy and were used both horizontally and vertically.
Don't recall the size of the 8", but guess it was in the ~200kB range.
5.25" were 90kB (single sided, single density), 180kB (single sided, double density) and 360kB (DS/DD). Also some other odd formats.