So, what to use ? Writable CDs ? They have only a guaranteed

lifetime of less than 15 years. Tapes ? Maybe - I have some PBS Tapes from 1976 and they are still readable, but they are 900 and 1600 BpI tapes. Any modern optical and magnetical medium is less reliable. So printing the hex dump and then try to scan it back (ocr) when a replacement is needed ? This sould be reliable, since it is human readable (Like old magnetic tapes).

Or just put it again on EPROMS - with propper handling EPROMS could survive at least 50+ years - and PROMS (real one not EPROMS without window) should live even longer. So just copy them. And beside the information -