20 Jun
2023
20 Jun
'23
8:53 p.m.
OK. I have just read in a bunch of Rainbow disks. Most of them read fine on
the first, second or third try. Some have a sector or three amiss (I've not
yet checked to see if those sectors are mapped to the filesystem or not).
Some appear to be 'unformatted' though sometimes they read with errors.
These disks have what appears to be some kind of grime/mold/??? on their
surface.
Is there a good way to read these diskettes? To clean the grime off and
allow the floppy to spin (they all are super loud)...
At the rate things are going, there will be 5-10 of these...
Warner
20 Jun
20 Jun
8:59 p.m.
On Tue, Jun 20, 2023 at 1:53 PM Warner Losh via cctalk <
cctalk(a)classiccmp.org> wrote:
OK. I have just read in a bunch of Rainbow disks. Most
of them read fine on
the first, second or third try. Some have a sector or three amiss (I've not
yet checked to see if those sectors are mapped to the filesystem or not).
Some appear to be 'unformatted' though sometimes they read with errors.
These disks have what appears to be some kind of grime/mold/??? on their
surface.
Is there a good way to read these diskettes? To clean the grime off and
allow the floppy to spin (they all are super loud)...
At the rate things are going, there will be 5-10 of these...
Warner
This rig can do the job ==> https://www.ebay.com/itm/303620862566
Sellam
21 Jun
21 Jun
2:06 a.m.
On 6/20/23 13:59, Sellam Abraham via cctalk wrote:
On Tue, Jun 20, 2023 at 1:53 PM Warner Losh via cctalk
<
cctalk(a)classiccmp.org> wrote:
> OK. I have just read in a bunch of Rainbow disks. Most of them read fine on
> the first, second or third try. Some have a sector or three amiss (I've not
> yet checked to see if those sectors are mapped to the filesystem or not).
> Some appear to be 'unformatted' though sometimes they read with errors.
> These disks have what appears to be some kind of grime/mold/??? on their
> surface.
>
> Is there a good way to read these diskettes? To clean the grime off and
> allow the floppy to spin (they all are super loud)...
>
> At the rate things are going, there will be 5-10 of these...
Depends on what's making the noise. If it's dirt and heavy, I remove
the cookie to a clean jacket after cleaning. If it's oxide shedding, I
use a couple of drops of cyclomethicone on each side.
Works every time.
--Chuck
8:50 a.m.
On Tue, 20 Jun 2023, Chuck Guzis wrote:
the cookie to a clean jacket after cleaning. If
it's oxide shedding, I
use a couple of drops of cyclomethicone on each side.
Is it essentially the same as silicone oil? Because cyclomethicone is just
a category for three different cyclic siloxanes (D4, D5 and D6), namely
cyclotetrasiloxane, cyclopentasiloxane and cyclohexasiloxane.
D4 and D5 have been put on the ECHA list of forbidden substances in 2018.
So, what exactly do you use? ;-)
Christian
3:15 p.m.
On 6/21/23 01:50, Christian Corti via cctalk wrote:
On Tue, 20 Jun 2023, Chuck Guzis wrote:
This stuff:
https://pubchem.ncbi.nlm.nih.gov/compound/Decamethylcyclopentasiloxane
The ECHA documents are linked. As far as I can determine, use has been
restricted, not forbidden in the ECHA. The cosmetics industry would
likely go bankrupt without it.
I'm not suggesting that anyone drink it or bathe in it (although it is
used in many shampoos), but then, neither am I suggesting people bathe
in petrol either, although it's useful and carcinogenic.
Manufacturing data shows that at least a hundred million tons of the
stuff is manufactured yearly.
I use it on disks and tapes because it's a lubricant that's both
chemically inert and volatile; that is, after using, it evaporates and
leaves the medium unaffected.
Make your own decisions.
--Chuck
the cookie to a clean jacket after cleaning. If
it's oxide shedding, I
use a couple of drops of cyclomethicone on each side.
Is it essentially the same as silicone oil? Because cyclomethicone is
just a category for three different cyclic siloxanes (D4, D5 and D6),
namely cyclotetrasiloxane, cyclopentasiloxane and cyclohexasiloxane.
D4 and D5 have been put on the ECHA list of forbidden substances in 2018.
So, what exactly do you use? ;-)
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4 comments
4 participants
participants (4)
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Christian Corti -
Chuck Guzis -
Sellam Abraham -
Warner Losh