8 inch floppies, decaying
terry at webweavers.co.nz
Wed Jul 11 03:33:07 CDT 2018
Just my experience, I once did a trial where I took two identical 5,25
inch disks of the same batch from the same manufacturer. These were clean
disks which both formatted and verified just fine, but I wanted to see if
IPA did indeed damage the disk.
One I swabbed one with 75% IPA, the other with warm water with a touch of
On checking the IPA swabbed disk now showed a few damaged sectors. The
water/detergent one did not.
It's not scientific (just one rep) and I was quite aggressive with the
wiping. However, it made me steer away from IPA. Immersing the platters
in warm water with a touch of detergent, and gently wiping (then air
drying) works well for me when cleaning "dirty disks".
On Wed, Jul 11, 2018 at 8:17 PM, Steve Malikoff via cctalk <
cctalk at classiccmp.org> wrote:
> Fred asked
> > What concentration of IPA were you using?
> 99% Laboratory grade. Not very pleasant to have on the skin, it dries it
> out shockingly.
> > There might be a difference in results between 70% and 91%
> > There might also even be a difference in the oxide formulation between
> > brands. (If Chuck was trying to clean a Wabash, then it might dissolve
> > right through the plastic.)
> I've had Computer Resources, Wabash and other cheap diskettes long ago,
> they were
> none too good. Verbatim and Dysan always seemed pretty reliable for me.
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