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> It is a '70s 1200ft 3M tape, likely 9 track, which has a pretty good chance of being recoverable. Not old enough to have this kind of knowledge or confidence. I wonder if instead one day I'll be helping some future generation read old floppies, CDs, and IDE/ATA disks *slaps top of AT tower*.
Tapes from back then haven’t held up over the years. It all depends on the environment it was stored in.
> It is a '70s 1200ft 3M tape, likely 9 track, which has a pretty good chance of being recoverable. Not old enough to have this kind of knowledge or confidence. I wonder if instead one day I'll be helping some future generation read old floppies, CDs, and IDE/ATA disks *slaps top of AT tower*.
You might be able to use that old floppy drive. But you won't be able to use that old Pentium machine the drive is in. Because you will need several hundred gigabytes of RAM and a very fast IO bus. The gold standard today for archiving magnetic media is to make a flux image. The media is treated as if it were an analog recording and sampled at such a high rate that the smallest details are captured. Interpretation is…
recordable CD-Rs or DVD-Rs do not last close to that long, and those are the ones that hold the only copies of certain bits (original versions of software, etc) that people are most interested in not losing.
manufactured CDs and DVDs hold commericial music and films that are for the most part not rare at all.
> It is a '70s 1200ft 3M tape, likely 9 track, which has a pretty good chance of being recoverable. Not old enough to have this kind of knowledge or confidence. I wonder if instead one day I'll be helping some future generation read old floppies, CDs, and IDE/ATA disks *slaps top of AT tower*.
You might be able to use that old floppy drive. But you won't be able to use that old Pentium machine the drive is in. Because you will need several hundred gigabytes of RAM and a very fast IO bus. The gold standard today for archiving magnetic media is to make a flux image. The media is treated as if it were an analog recording and sampled at such a high rate that the smallest details are captured. Interpretation is…
Anyway, since nobody much seems to realise this is quite a big deal, I will share the explainer I wrote yesterday: https://www.theregister.com/2025/11/07/unix_fourth_edition_t... Unix V4 is otherwise lost. It was the first version in C.
This video on the linked github page for the analysis software[1] is interesting:
> It is a '70s 1200ft 3M tape, likely 9 track, which has a pretty good chance of being recoverable. Not old enough to have this kind of knowledge or confidence. I wonder if instead one day I'll be helping some future generation read old floppies, CDs, and IDE/ATA disks *slaps top of AT tower*.
After 10 years, which was longer than the assumed shelf life of writable/rewritable DVDs at the time, I never found a single corrupt file on the disks. They were stored in ideal conditions though, in a case, in a closed climate controlled shelf, and rarely if ever removed or used.
Also, just because I think it's funny, the archive was over 4000 DVDs. (We had a redundant copies of the data compressed and uncompressed, I think it was like 3000 uncompressed 1k compressed) there was also an offsite redundant copy we put on portable IDE (and eventually SATA) drives.
OT - Mastodon is seriously cool. If you haven't yet bothered, I suggest to everyone that you spend a bit of time exploring.
Earlier quoted context omitted.
You might be able to use that old floppy drive. But you won't be able to use that old Pentium machine the drive is in. Because you will need several hundred gigabytes of RAM and a very fast IO bus. The gold standard today for archiving magnetic media is to make a flux image. The media is treated as if it were an analog recording and sampled at such a high rate that the smallest details are captured. Interpretation is…
> As for CDs, I don't see the rush; the ones that were properly made will likely outlast human civilization. recordable CD-Rs or DVD-Rs do not last close to that long, and those are the ones that hold the only copies of certain bits (original versions of software, etc) that people are most interested in not losing. manufactured CDs and DVDs hold commericial music and films that are for the most part not rare at all.
Long-lasting, good quality mastered optical media is probably mass produced and has many copies, including a distinct and potentially well-preserved source.
It's probably fair to say that a lot of mixtapes (mix CDs?) from the early 2000s are lost to dye issues...
> It is a '70s 1200ft 3M tape, likely 9 track, which has a pretty good chance of being recoverable. Not old enough to have this kind of knowledge or confidence. I wonder if instead one day I'll be helping some future generation read old floppies, CDs, and IDE/ATA disks *slaps top of AT tower*.
Just anecdata, but I had this concern when I worked in academia and we backed up all our data to writable DVDs. I was there 10 years after the start of the project and I periodically checked the old DVDs to make sure they weren't corrupted. After 10 years, which was longer than the assumed shelf life of writable/rewritable DVDs at the time, I never found a single corrupt file on the disks. They were stored in ideal c…
My oldest disc is some bright blue Verbatim disk my childhood friend made for me so I could play our favorite game at home pre-2000. I have a bit-perfect copy, but the actual disc still reads fine in 2025 when I last tested it.