Re: Timestamps jump by one hour when switching timezone

[Rodolfo Medina <rodolfo.medina@gmail.com>]

Rodolfo Medina wrote:

> Last sunday, in my time zone (Rome), clocks were got back by one hour.  I
> noticed that my Debian Lenny had done so automatically, but files timestamps
> were also took back by one hour, which is not what we want.


Camaleón <noelamac@gmail.com> writes:

> How is that? Do you have a proof of the timestamp change? :-?

> a random filesystem timestamp change is a very serious issue.


I do regular backups on an usb pendrive.  The last backup was made before
Sunday and the timestamps were the same on the PC and on the pendrive.  Now,
after the timezone switching, all files on the pendrive are one hour late
respect to the PC.  So, either the former jumped one hour ahead or the latter
jumped on hour back.

This behaviour had been foreseen on the present mailing last 13 August list by
Frank Otto in the thread `rsync re-syncs unmodified files':

      More importantly, if you live in an area which switches timezones during
      the year (summer/winter time aka daylight savings time), the timestamps
      on these files might suddenly jump by one hour (either the Linux times or
      the FAT times, I can't remember) and then rsync might want to sync them
      again. In this case, use modify-window=3602.

Bye
Rodolfo