5 Nov
2018
5 Nov
'18
10:22 a.m.
On Sun, Nov 04, 2018 at 07:16:35PM -0800, Ken Thompson via TUHS wrote:
so, we ran for 2 years and ended
up facing big problem in the 3rd.
our solution was to read all files
and all backup tapes and subtract
one year from all dates and move
the epoch up a year. we didnt mind
since dectapes (our backup tapes)
had to be rewritten to keep the bits
from rotting.
we did it again the next year and
when disaster was facing us on
the 4th year, we went to seconds.
This bit me when Dennis sent me an electronic copy of a DECtape from
this timeframe. It took us quite a while to decide how to interpret
the timestamps. See:
https://www.tuhs.org/Archive/Distributions/Research/1972_stuff/Readme
right down the bottom.
Cheers, Warren