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Copy That Floppy – Cambridge guide for preserving data from fragile floppy disks

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Re: Copy That Floppy – Cambridge guide for preserving data from fragile floppy disks

#11
Efficient market hypothesis applied to this topic would say that if you really do have a floppy, you should already have made a copy of it. If that’s Not the case, transform it to a punched card and be done with it.

The chance that one would have anything important on a floppy that is not already backed up in the year of 2026 must be close to zero.

Re: Copy That Floppy – Cambridge guide for preserving data from fragile floppy disks

#14
Floppy disks were ubiquitous when I was in college. When I got into Linux, I did an experiment raw writing zeros to floppies with dd to see what percentage of them had I/O errors. I tested with a stack of about 50 of them that were left in our computer lab over the years (different brands). The failure rate was staggering. Something like 30-40% of them had bad sectors. After that, I realized that I could never rely on them as a storage medium for anything important without regular backups.

Re: Copy That Floppy – Cambridge guide for preserving data from fragile floppy disks

#15

Floppy disks were ubiquitous when I was in college. When I got into Linux, I did an experiment raw writing zeros to floppies with dd to see what percentage of them had I/O errors. I tested with a stack of about 50 of them that were left in our computer lab over the years (different brands). The failure rate was staggering. Something like 30-40% of them had bad sectors. After that, I realized that I could never rely o…

I wonder if anyone made an error correcting driver or file format for unreliable data storage like this. Did anyone ever implement RAId (redundant array of independent diskettes)? Edit: apparently RAR had an option to add internal error correction data to the archive, and you can also use PAR2 files for another layer (I think that's able to reconstruct the archive if one file is totally unreadable)

Re: Copy That Floppy – Cambridge guide for preserving data from fragile floppy disks

#16

Floppy disks were ubiquitous when I was in college. When I got into Linux, I did an experiment raw writing zeros to floppies with dd to see what percentage of them had I/O errors. I tested with a stack of about 50 of them that were left in our computer lab over the years (different brands). The failure rate was staggering. Something like 30-40% of them had bad sectors. After that, I realized that I could never rely o…

. . . simultaneously over-writing the last remaining copy of the original Linux!

Re: Copy That Floppy – Cambridge guide for preserving data from fragile floppy disks

#17
post #5

Earlier quoted context omitted.

Generally it's easier to just copy the data to each new media as you adopt it. In the past this was pretty easy to do as the hard drive held way more data than the floppy disks of old. The next hard drive was an order of magnitude larger than the old one, and so on. Unfortunately this sputtered out during the SSD transition and became even more ephemeral as people started putting data in the cloud where it will event…

> The next hard drive was an order of magnitude larger than the old one, and so on. Ah yes, the good old "old PC" folder that you would find on pretty much every Windows PC that used to have another "old PC" folder inside it somewhere, possibly inside an "external HDD (old)" folder :-) Until the PC (or the HDD inside it) died surprisingly, people didn't have backups, or the backups turned out to be burned CDs that we…

Hehe, I used to create a folder as some variant of "Old" and move everything in my downloads folder into it once or twice a year, and with a lesser frequency my documents. At one point when I realised this had got about 10 levels deep, I switched to yyyy-mm format directories instead of nesting them.

I also used to back up other PCs to each other somewhat regularly, and sometimes I'd end up with those files back on the original PC in a backup of another. Fortunately, when I switched to borgbackup on Windows as well [1], this massive reduplication of files became a solved problem.

[1] borgbackup doesn't officially work on Windows, but I run it in WSL which does reasonably well for all the files I really care about (i.e. the stuff I've made). When they have particular unusual characters in the filenames, it throws up a warning for that file every time, but otherwise seems fine. I've never bothered investigating whether those particular files restore to the correct filename, because I know I've also backed up the zip file those files have come from and it's just accidental that I've backed up the extracted files as well.

Re: Copy That Floppy – Cambridge guide for preserving data from fragile floppy disks

#18

Floppy disks were ubiquitous when I was in college. When I got into Linux, I did an experiment raw writing zeros to floppies with dd to see what percentage of them had I/O errors. I tested with a stack of about 50 of them that were left in our computer lab over the years (different brands). The failure rate was staggering. Something like 30-40% of them had bad sectors. After that, I realized that I could never rely o…

Floppy reliability dropped of a cliff in the mid-90s. It came to a point where it wasn't unusual to see I/O errors even on completely new floppies.

But with older drives and older media, produced to a higher standard, they were pretty reliable. (After all, IBM invented them to store CPU microcode, they had to be.)

Re: Copy That Floppy – Cambridge guide for preserving data from fragile floppy disks

#19
post #5

Earlier quoted context omitted.

Generally it's easier to just copy the data to each new media as you adopt it. In the past this was pretty easy to do as the hard drive held way more data than the floppy disks of old. The next hard drive was an order of magnitude larger than the old one, and so on. Unfortunately this sputtered out during the SSD transition and became even more ephemeral as people started putting data in the cloud where it will event…

> The next hard drive was an order of magnitude larger than the old one, and so on. Ah yes, the good old "old PC" folder that you would find on pretty much every Windows PC that used to have another "old PC" folder inside it somewhere, possibly inside an "external HDD (old)" folder :-) Until the PC (or the HDD inside it) died surprisingly, people didn't have backups, or the backups turned out to be burned CDs that we…

I still have a bunch of these called "FromOld".
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