[rescue] Various machines for sale

[Joshua Boyd]

On 1/9/25 12:15, Patrik Schindler via rescue wrote:
> Hello Dave,
>
> Am 09.01.2025 um 17:55 schrieb Dave McGuire via rescue<rescue at sunhelp.org>:
>
>>   But...I pooped a few minutes ago.  It was brown.  I would not call it rust. ;)
> Also, it's most likely not magnetic. ;-)
>
>>   I am drinking coffee...it is brown...
> Same. ;-)

Plus, both probably aren't heavy in iron oxide.

But, on the disk side, wasn't Fe2O3 used for awhile on disk platters?  I 
imagine they changed at some point, but finding details on when and to 
what are not turning up in 5 minutes of googling.  A paper from 2003 
talks about Nitrogenated and hydrogenated amorphous carbon films, but I 
think they are talking about a protective layer over the magnetic 
material.  Wikipedia says something about a cobalt based alloy, but I 
can't find anything definite beyond that, and when I go looking for 
Cobalt alloys, they mostly seem to be cobalt and iron and other stuff. 
If the other stuff includes oxygen, I suspect that would mean it was 
still fair to call it ferrous oxide.
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