DST - file time stamp problem


G

Guest

I am re-posting this issue since it appears the earlier string has fizzled
out….

The issue is that the automatic Daylight Savings Time clock adjustment
feature also changes my file dates/times. This means that the back-up files
on my external storage time all become one hour older in spring, and one hour
newer in fall. This makes backing up my files a problematic chore.

My question has devolved into this:

What is in Windows that changes the file time stamps on the internal hard
drive, but not change the file time stamps on the external the hard drive?

How do I force Microsoft leave the file dates alone?, or update them all
equally?

Original Problem Description ----------------------------

A file date may be listed as 3/20/2007, 10:30am, and once DST shifts, it
changes to 3/20/2007, 11:30am.

I back-up my files using a third-party software that among other things
looks at the latest file date to prepare back-ups to a separate hard drive.
When the computer automatically updates the clock to daylight savings time,
the file comparison shows that all of my files are now listed with a
modification date that is exactly one-hour newer than that of the last
back-up files. The back-up now wants to replace every file with the “newerâ€
version. Since I have many files, this is not a reasonable approach.

If I perform the update, and replace the “old†files, this creates a similar
problem when DST reverts to standard time. Since I am essentially mirroring
the files, twice per year I have to do this ridiculous change.

As a side note, this same effect also applies when I shift time zones – e.g.
visiting a different location. However, in that case, Microsoft also screws
up all of my Outlook calendar entries for any event scheduled as an “all-dayâ€
event and changes them to a 24 hour event starting one evening and ending the
next.
 
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L

Lem

John said:
I am re-posting this issue since it appears the earlier string has fizzled
out….

The issue is that the automatic Daylight Savings Time clock adjustment
feature also changes my file dates/times. This means that the back-up files
on my external storage time all become one hour older in spring, and one hour
newer in fall. This makes backing up my files a problematic chore.

My question has devolved into this:

What is in Windows that changes the file time stamps on the internal hard
drive, but not change the file time stamps on the external the hard drive?

How do I force Microsoft leave the file dates alone?, or update them all
equally?

Original Problem Description ----------------------------

A file date may be listed as 3/20/2007, 10:30am, and once DST shifts, it
changes to 3/20/2007, 11:30am.

I back-up my files using a third-party software that among other things
looks at the latest file date to prepare back-ups to a separate hard drive.
When the computer automatically updates the clock to daylight savings time,
the file comparison shows that all of my files are now listed with a
modification date that is exactly one-hour newer than that of the last
back-up files. The back-up now wants to replace every file with the “newerâ€
version. Since I have many files, this is not a reasonable approach.

If I perform the update, and replace the “old†files, this creates a similar
problem when DST reverts to standard time. Since I am essentially mirroring
the files, twice per year I have to do this ridiculous change.

As a side note, this same effect also applies when I shift time zones – e.g.
visiting a different location. However, in that case, Microsoft also screws
up all of my Outlook calendar entries for any event scheduled as an “all-dayâ€
event and changes them to a 24 hour event starting one evening and ending the
next.

If you haven't already looked at the last post in your earlier thread
(time stamped, on my computer in NYC, at 2:30 pm, about an hour after
your post here is time stamped), see the MSKB article:
Time stamp changes with daylight savings
http://support.microsoft.com/kb/129574/en-us

I think the only answer to "How do I force Microsoft leave the file
dates alone?" is to reformat all of your hard drives to FAT32 instead of
NTFS -- which is probably not a reasonable suggestion.
 
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G

Guest

Lem said:
If you haven't already looked at the last post in your earlier thread
(time stamped, on my computer in NYC, at 2:30 pm, about an hour after
your post here is time stamped), see the MSKB article:
Time stamp changes with daylight savings
http://support.microsoft.com/kb/129574/en-us

I think the only answer to "How do I force Microsoft leave the file
dates alone?" is to reformat all of your hard drives to FAT32 instead of
NTFS -- which is probably not a reasonable suggestion.

--
Lem MS MVP -- Networking

To the moon and back with 64 Kbits of RAM and 512 Kbits of ROM.
http://en.wikipedia.org/wiki/Apollo_Guidance_Computer

Thank you for your response.

The problem description is quite accurate, but it does not tell me why the
timestamp is only affected on the internal hard drive, but not on an external
drive. I do not care that the time stamp shifts, just that it does so
uniformly.

My concern is that I may loose data when files that have been modified
recently are backed up and overwritten by older files that have a newer date
stamp. My backups duplicate the source drive folders, so many files are
copied over, and some deleted.
 

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