Normally /D (without a date) copies only newer files.
But, it determines what is newer from the time/date stamp on each file.
If the time/date stamp is changed, such as during a switch to/from daylight
saving time, then I have seen cases in which all files appear to be new and
are copied. For this reason I have turned off the automatic adjustment for
daylight saving time on the XP clock's time-zone tab.
I have also seen one case in which backing up to a network drive had a
similar problem, even though both PCs were nominally in the same time zone,
with the same options.
"yacrumb" <yacrumb[ at ]yahoo.se> wrote in message
news:1183821475.931661.219650[ at ]n60g2000hse.googlegroups.com...
[Quoted Text] > Hello all,
>
> I am trying to setup a backup-script with xcopy like this:
>
> xcopy C:\projects Z:\backup\projecs /D /E /I /Y
>
> But all files are copied each time it is run. Since /D switch is
> given without date then only newer files should be copied, right? What
> am I missing?
>
> Thanks in advance!
>
> /Rasmus
>
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