What's happening to my floppy drives?

[hayashi]

OK, I've now managed to put a grand total of 4 Amiga floppy drives out of action with bad disks. I should have really learned my lesson by now, but no, I'm an idiot and I apologise for the time I'm wasting here.

I know that the floppy drives are being killed by physically defective disks (I think this time I killed it trying to check it for not being physically defective), and the result is a horrific scraping noise, followed by the disk spouting read errors, then "not a valid DOS disk" errors, then not reading at all.

Does anyone else know anything more about this? Also, feel free to yell at me or whatever for being probably the most negligent Amiga owner in the universe. =(

[hayashi]

OK, in a cruel twist of fate, I ordered another floppy drive with borrowed money, only to find that the next time I turned the Amiga on the drive WORKED PERFECTLY.

._.

Still, I've managed to kill 3 other drives with bad disks... though seeing what just happened the problem may be completely rectifiable, in which case I've now wasted £27 on new drives. =(

And don't worry, I won't be using any of those disks again

[hayashi]

It displays the error while trying to boot from the disk, too. Also, my floppy drives also make a tiny grr after ejecting a disk, though it doesn't last for more than a second.