An initial analysis of the discovered Unix V4 tape

#1

Post by DSpinellis » Tue, Dec 23, 2025, 6:22 PM UTC

An initial analysis of the discovered Unix V4 tape
spinellis.gr

Re: An initial analysis of the discovered Unix V4 tape

#2

Post by ChrisArchitect » Tue, Dec 23, 2025, 8:01 PM UTC

Ongoing posts about the tape discovery and work: https://discuss.systems/@ricci/115748594116050292

Re: An initial analysis of the discovered Unix V4 tape

#3

Post by ChrisArchitect » Tue, Dec 23, 2025, 8:01 PM UTC

ChrisArchitect wrote: post #2

Ongoing posts about the tape discovery and work: https://discuss.systems/@ricci/115748594116050292

Previously:

Unix v4 Tape Found

https://news.ycombinator.com/item?id=45840321

Re: An initial analysis of the discovered Unix V4 tape

#4

Post by NitpickLawyer » Tue, Dec 23, 2025, 8:22 PM UTC

> (The results also show that I need to examine the apparent timing mismatch between the First and Second Editions.)

Something something, naming things, cache invalidation, timestamp mismatches and off-by-1 errors :)

Re: An initial analysis of the discovered Unix V4 tape

#5

Post by userbinator » Tue, Dec 23, 2025, 9:10 PM UTC

NitpickLawyer wrote: post #4

> (The results also show that I need to examine the apparent timing mismatch between the First and Second Editions.) Something something, naming things, cache invalidation, timestamp mismatches and off-by-1 errors :)

It could just be as simple as being a later "final" copy of V1, made when it was "done".