2008/12/8 William L. Maltby CentOS4Bill@triad.rr.com:
In reality, being raised on real UNIX(TM) systems from long ago and far away, it was just one of the things we wanted left unchanged when we did backups or shipped tapes to the outside world (one of my many jobs back then). There is the possibility that atime was tracked "because we can".
I've been there too. My first UNIX account was on a Vax 750 running BSD 4.2 in 1986, which after a year I started to manage (that's why I said that dump/restore "are so '80's" :).
Times changed. I believe the reasoning which says that atime is a waste of time (pun intended :). Move on.
Cheers,
--Amos