I think that I have once seen an Internet article, which stated, that special drives are capable of making many megabytes of data out of one ordinary MF-2HD floppy disk.
But I am unable to find it again. Did such a drive actually exist?
Is there any more accurate documentation about this technology? Is there any way to store 32MB on a MF-2HD in 2018? And what aboue DD and ED disks?
I found more information here:**
- http://www.theregister.co.uk/2000/10/23/32mb_on_a_humble_floppy/ 32MB on a humble floppy
- http://en.wikipedia.org/wiki/Floppy_disk (that's where I probably read it one day: “For example, the LS-240 drive supports a 32 MB capacity on standard 3½-inch HD disks, but it is, however, a write-once technique, and requires its own drive.”)
Wikipedia article mentions Zone Bit Recording.
Because the sectors have constant angular size, the 512 bytes in each sector are compressed more near the disk's center. A more space-efficient technique would be to increase the number of sectors per track toward the outer edge of the disk, from 18 to 30 for instance, thereby keeping nearly constant the amount of physical disk space used for storing each sector; an example is zone bit recording.
Is that high density writing technology with 32MB still CAV or CLV like optical discs (CD, DVD, HD-DVD, BD, etc.)? Does it utilize ZBR?
Answer on other question by @ChenMunka:
You would not expect a quick format to repair corruption from magnetic fields as it doesn't recreate the track and sector sync markers.
This means, that the track sector information can be written on a format. Does that not mean, that an ordinary drive could possibly squish like 10MB on a floppy disk by formatting it with different track/sector information?
to format or write to this high-coercivity media, the high-density drive switched its heads into a mode using a stronger magnetic field. When these stronger fields were written onto a double-density disk (having lower coercivity media), the strongly magnetized oxide particles would begin to affect the magnetic charge of adjacent particles. The net effect is that the disk would begin to erase itself.
How long does it take for the floppy disk to erase itself when treated like an ED? Can I store 2.88MB on MF-2HD for 10 minutes?