About history, Jacob Rabinow invented the method of writing and reading information magnetically in disks using inductive heads, the father of all floppies and HD. In 1951 he filled the patent, “coincidentally” in 1952 IBM built installations to develop and build technologies just like that in San Jose, CA. In 1954, Rabinow had his patent granted, in 1956 IBM started selling its version of magnetic disks with their mainframes and ended needing to pay royalties to Rabinow anyway.
It does. They won’t be exactly “erased” but damaged. Bits will change their values. Sectors will contain invalid data and will be reported as damaged by the controller (Bad CRC). A value as 832823116 could end as 239413414 if it was accepted damaged.
In the 80’s I wrote disk drivers (and serial, parallel, keyboard, video, etc), and I “talked” to disks near to the bit level because the controllers were very basic those years and many tasks and timings were done at the CPU level.
I can tell you with property, magnets damage disks, because (electro)magnets write those disks.
The floppy even made the news in january this year
“Japan finally gives up on 1.44MB floppy disk drives, 50 years after they went on sale — but there’s no sign of Microsoft removing the iconic ‘Save’ floppy icon from Office just yet”
Thunderbird (email client) uses the cloud with a down arrow for “check for new messages” Should you need a Tooltip for such a basic operation? Why not have the icon look like an envelope? But I suppose that’s off-topic because it isn’t humorous, it’s pathetic.
