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Robocopy & dates and such



 
 
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Old March 13th 19, 12:51 AM posted to alt.windows7.general
pyotr filipivich
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Posts: 752
Default Robocopy & dates and such

Okay, for those new to the discussion:

I use Robocopy to sync files from the Harddrive (ntfs) to
thumbdrives (FAT32)
Saturday the 9th of March at 22:20 PST is started the sync and it
ended Sat Mar 09 22:21:48 2019, having copied all 13 files and all is
normal. Takes about one minutes.
Sunday evening, I run the same batchfile at 21:51 and it proceeds
to copy "everything"." From page 850 of the 2 logfile:
Start of transfers to Drive F was at 2151 "

Started loading Thumb at 2151
Ending Thumb Loading at (2237)
eot
This was, to say the least, very disconcerting.

The consensuses of the assemble minds here, is that it is a
feature of how the different file systems (NTFS and FAT32) handles the
minutia of time stamping files.

The suggestion I use the /TS switch is fine, but that merely logs
the time stamps of the files.
/CopyAT is default, it copys the Date Attributes and Time of the
source file.
adding the /TimFix switch, whatever it does, it is also copying
files as newer which had not been changed.

Ah-ha. It comes to mind "Is the Archive attribute bit set?" Yes,
it is! So use the /M switch to copy only those with the archive bit
set, and reset it. Testing it, that does seem to "fix" the issue of
copying the western world.

Why? I still do not know. This is one of those thing where the
layman's explanation is "Magic", and the Technical Explanation is
"pure freaking magic." B-)

--
pyotr filipivich
The question was asked: "Is Hindsight overrated?"
In retrospect, it appears to be.
 




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