Hi,
Paul posted this a day or so after the other
post and it seems the Hot & Cold Affair disk
did work again after leaving it overnight (see
below).
Regards,
Andrew B
aliensrcooluk at yahoo.co.uk
--- Paul Panks <lumberjacks76 at lycos.com> wrote:
There is an addendum added to yesterday's
posting of Phase III of the Diskette Experiments.
Here is the addendum:
A new conclusion has been reached regarding
the second disk experiment. Additionally, the
final Phase III conclusion has been modified
somewhat to showcase this change:
"The Hot and Cold Affair
-----------------------
This test called for putting ice cubes on the
front side of the disk, while simultaneously
holding the back side of the disk over a
stovetop range at Medium heat (held
approximately 3/4th of a foot from the
surface of the stovetop due to overwhelming
heat and potential hand burn considerations).
The disk was held over the surface for a
period of ten (10) minutes, while carefully
juggling the ice cubes on the 1st surface
simultaneously.
The disk was allowed to cool for a period of
20 minutes, then read. The result was a disk
that did not read, as the internal mylar floppy
could barely be moved by force from side to
side by this person.
Conclusion: The disk was unreadable due to a
physical (non-bit) failure of the disk jacket
and internal disk mylar semi-sticking to the
jacket itself. However, after waiting overnight
and trying the disk again, it read without
error. Performing a simple read/write on the
disk -- writing (then reading back) a 2 block
sequential file -- worked flawlessly. Although
heating the disk and placing icecubes atop it
is not recommended, the disk nonetheless did
recover once it was allowed to cool overnight."
The conclusion has also been modified
somewhat. Here is the change:
"Experiment Phase III Conclusions
--------------------------------
Two of the disks were a total loss, as the
experiment never progressed beyond the first
question asked ("Could a disk still be read by
the disk drive?"). The disk in the "Hot/Cold
Affair" experiment failed at first, but then
worked upon waiting 24 hours for the internal
disk mylar to cool overnight.
Disks are not impervious to permanent and
irreversible physical damage from oatmeal,
milk, water, heat ( >= 250 degrees F ), ice
cubes, shoes and golf spikes. Heating a disk
and placing ice cubes atop it will cause it to
temporarily become unreadable, although the
disk should return to working order within 24
hours. It is nonetheless strongly recommended
by this person that end users strictly avoid
such implements (as described above) when at,
near or around a floppy disk or drive."
The entirety of the Diskette Experiments can
be viewed online here:
http://www.geocities.com/dunric/diskfun.txt
Paul