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Questions tagged [data-preservation]

For questions related to data preservation, archiving, and backups.

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55 votes
9 answers
26k views

How long will floppy disks maintain data integrity?

This was on CNN today: The U.S. is still using floppy disks to run its nuclear program Which led me to read through this article: Think the floppy disk is dead? Think again! Here’s why it still ...
Aaron's user avatar
  • 2,384
16 votes
3 answers
3k views

Finding byte boundaries in floppy disk MFM bitstreams

I'm building myself a floppy disk interface based on a microcontroller. I'm successfully reading the bitstream off the disk and (probably) decoding the MFM bitstream into actual bits, based on the ...
David Given's user avatar
  • 1,320
11 votes
3 answers
1k views

Where can I donate my old Computer Shopper Magazines to make sure they get scanned and shared?

I am sure many of you remember the gigantic Computer Shopper magazines of the 1990's; but Computer Shopper actually dates back to sometime in 1979, and still exists in electronic form today. In my ...
Geo...'s user avatar
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14 votes
4 answers
3k views

Make a BASIC TAP file readable on Linux

I am trying to convert my own BASIC TAP files (containing BASIC programs) to text so that they are readable on my Debian GNU/Linux machine. If I open them as is, I get this, which gives me some hope, ...
harlandski's user avatar
  • 2,953
18 votes
7 answers
6k views

What should be the waveform for ZX Spectrum tapes?

I am digitizing about 40 tapes with programs for the ZX Spectrum. I am somewhat puzzled by the waveform after digitization. The signal of most cassettes is meander-shaped. One of the cassettes can ...
A. Rumlin's user avatar
  • 391
7 votes
6 answers
2k views

How can I copy files from a Compaq Deskpro?

I have a Compaq Deskpro EN 6266 Deskpro EN PII 266 Computer, pictured below. When I try to insert a 4.7 GB optical disk, the PC stops. When I use a 720MB optical disk it says that I don't have ...
Ciolte Alin's user avatar
29 votes
1 answer
6k views

How can I take an image of a 50-pin SCSI hard-drive

I have two 50-pin SCSI hard-drives that I need to image. However, after spending quite a while searching across the Internet, I cannot find any adapters to convert the 50-pin connector to something ...
David B's user avatar
  • 293
16 votes
4 answers
5k views

Is there any way today to recover/dump 2M disks?

2M disks where formatted using 2MGUI to increase 3"1/2 & 5"1/4 DD/HD/ED disks' capacity. Is there any way today to recover/dump these disks to a file with modern hardware? Specially the 5"1/4 ...
NataliaPC's user avatar
  • 533
13 votes
7 answers
3k views

How can I convert Epson escape codes to a more usable format?

I have many GWBasic programs peppered with Epson-specific escape sequences (ESC/P). Unfortunately I no longer have any printers that support these escape sequences. Is there any way I can convert ...
collin Geoffrey's user avatar
10 votes
1 answer
1k views

What is the history of data compression tools on personal computers?

On UNIX, the progression of the most widespread data compression programs was as follows: (AFAIR: Pre System V) compact (suffix .C), dynamic Huffman coding (AFAIR: introduced in System V) pack (...
Leo B.'s user avatar
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