What makes floppy disk unreliable




















The process is simple on both Macintoshes and IBM-compatible computers. On the Macintosh side, you need to use a program called Fetch. Open it, it is usually located with Internet software and connect to fas. Once connected, you will be presented with a list of the files in your fas home directory. To put a file there, select "put," but be sure to remove any spaces from the filename before sending it. On PCs, the process is not much different.

Provide the same information as that described for Macintoshes. Once connected, you will be presented with two panes. In the left is your local PC; in the right is your fas home directory. Your file cannot become infected in this space, and the odds of your data being lost or corrupted in any other way are even smaller.

Your fas home directory is probably the safest place to store your files. When you want to work on the file in the future, just transfer it out of your fas account onto the local computer. Some final thoughts: first, keeping files in your home directory solves more than just the problem of virus transfer.

Even my ZX clone from is still functional. And the modern ones are up to years tops Even for disks which have self-erased due to entropy, high temperature storage, or poor chemistry resistance to self-demagnetization, these disks are not necessarily defective.

If the magnetic coating has not itself degraded or detached from the plastic, then a self-erased disk can still be used again by low-level reformatting of the entire disk, which lays down new magnetic patterns that defines new data boundaries for tracks and sectors. Due to differences in head width and signal strength for low and high density drives, a full erasure with a powerful "bulk erasure" magnet is preferred before low-level reformatting to remove any such old patterns.

It could read weak sectors, attempt statistical recovery through multiple rereading, and then rewrite each sector to refresh the magnetic patterns. A stepper always turns a precise number of degrees for each step, which would be used to position the heads for each track. But due to the loose mechanical nature of these hard drives, there was some "slop" in the head positioning.

Also external physical impacts could cause the heads to "skip" to a new location, which the stepper can not detect and then leads to the drive being confused about where it is reading or writing.

If this track-skipping occurs during a write, it can lead to catastrophic data corruption. An improvement over this was the use of optical encoders and the voice-coil servo positioner. There was a clear glass or plastic band with tiny black stripes printed on it, attached to the head positioning arm, and passing over a light sensor.

If the drive head were to be struck and head misalignment occurred, it would immediately detect the misalignment due to the motion of the optical encoder, then stop whatever it was doing and reposition the heads back over the correct track again. This worked well, but there is a limit on how precise the optical encoder can be, as tracks became ever smaller and smaller as capacity increased.

These drives could also still be low-level formatted due to the external optical track positioning sensor. At some point there was a transition to a new way of positioning the heads, using special magnetic markers read by the heads to tell them exactly where they are now on the platters.

These position markers are printed onto the platters at the factory using special external equipment, and it is not possible to reconstruct the markers once the drive has left the factory. This positioning method is used by all modern hard drives.

Early drives using this method would dedicate an entire platter surface to the servo data, but for modern drives, the permanent servo positioning data is mixed in among the regular read-write areas of each platter, and the drive electronics make sure to never overwrite that servo data. At this point it became impossible to do true low-level formatting because if the markers are removed, the drive has no idea where anything is on the platters and it becomes useless.

Also, this is why modern hard drives can not be "degaussed" using a powerful external magnetizer, as this removes the head-positioning servo data and the drive can no longer find where tracks are located. In , I can attest that at least 3. However, as an electronic musician, and also a fan of obselte and rare " retrotech ". So many people in my genre vaporwave and those adjacent sometimes use 3. I myself have released a few.

Complete with printed labels and all. And I have tested the discs at various intervals, and out of the new old stock I had from my last release [ 50 multi-colored discs ] only 1 was defective. All of them were unused, btw. Now, that could be on the rare side, and the person I got them from collects these types of older technology kinda my " tech " dealer if you will.

They had these stored in a climate controlled building, in a thick plastic bin, sealed in its packaging. So, I know this is like optimal circumstances. But only one dud out of 50 pieces of 30 year old stock, are not that bad of odds.

These were from the late 80's to early 90's, so they aren't like the 's types. But yeah, maybe not the best for like nuclear codes, but it makes one hell of an aesthetically pleasing album. However, having to compress a half gigabyte of data into 1. But, you don't exactly by a floppy album for the music quality. It's more for the nostalgia, and uniqueness.

Happy thoughts! Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. How long will floppy disks maintain data integrity? Ask Question. Asked 5 years, 5 months ago. Active 1 month ago.

Viewed 19k times. While I'm not exactly sure about the Air Force's use case, I'll pose a simple question: Can you take these disks off the shelf 30 years later and still expect to read their data? Improve this question. Aaron Aaron 2, 2 2 gold badges 13 13 silver badges 26 26 bronze badges.

Well the good news is if the disk fails they can't launch the nukes. One day we might all owe our lives to a bad 8" floppy. These are mil-spec floppys! These floppys are individually hand-built with military grade plastic substrate, the individual iron filings hand-inspected, then glued to the substrate and inspected using ISO procedures.

The titanium floppy jackets perhaps "floppy" is a misnomer were milled on certified CNC machines. But, no, you can't expect them to work after 30 years. It would still be cheaper than alternatives. Just doing a feasibility study to replace the drives would cost more. Easy solution: just get yourself one standard-issue s-floppy-drive-to-USB-stick converter like the U. To date, however, these moves have still not marked the end of the floppy disk as a mainstream means of data storage and exchange.

External USB-based floppy disk drives are available for computers without floppy drives, and they work on any machine that supports USB. Formatted capacities are generally set in terms of binary kilobytes as 1 sector is generally bytes. However, recent sizes of floppy are often referred to in a strange hybrid unit, i.

Historical sequence of floppy disk formats, including the last format to be generally adopted — the "1. The 1. If you have another system, check to see if the drive in that system is able to read the disk. If the disk works in a different drive, begin by checking for obvious problems. It is not unknown to find an object like a Post-It note or the metal slide protector from a previous disk stuck inside a drive.

Again, begin by checking for obvious problems. Make sure the floppy disk is not write protected. If there are no files already on the disk, try to re-format it. If your operating system is Windows , or Windows XP Professional, you can't boot from a floppy disk with these systems. Otherwise, make sure the disk you have is a bootable disk.



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