[SOLVED] rsync script problem

Davno · 08-19-2018, 08:01 PM

Hi,
I have a rsync backup script that use to work well, but when i run it onto a new target drive (portable usb drive), it keeps writing the source to the target directory all over every time, even when there is no change made.
If i run the script a second time without unmounting the target, it is ok, it just check.
The problem happen when i umount and mount again the portable usb drive.

I saw on google that may be rsync does not keep time/date of the files and rewrite everything.

P.S. No change was made to the script in years except for the UUID of the new drive.
P.S. This xfr#229 does mean it is being transfered? (xfr#229, ir-chk=1237/1780)

Code:

if [ -f /media/normand/1F16-AC89/500GigMounted ]

then
rsync -t -r -h --delete --progress --partial-dir=DIR --stats /media/normand/8d3f4d22-b6fb-4750-ba52-c2e2b484f43e/LinuxStuff /media/normand/1F16-AC89
rsync -t -r -h --delete --progress --partial-dir=DIR --stats /media/normand/8d3f4d22-b6fb-4750-ba52-c2e2b484f43e/PersonnelStuff /media/normand/1F16-AC89
rsync -t -r -h --delete --progress --partial-dir=DIR --stats /media/normand/8d3f4d22-b6fb-4750-ba52-c2e2b484f43e/Photos /media/normand/1F16-AC89
rsync -t -r -h --delete --progress --partial-dir=DIR --stats /media/normand/8d3f4d22-b6fb-4750-ba52-c2e2b484f43e/Video /media/normand/1F16-AC89
fi

Davno · 08-19-2018, 08:25 PM

UPDATE:
Forgot to mention that the (OLD) target drive was formated in NTFS and the (NEW) target drive is FAT32.
While Googling some more i realised that somebody had the exact same problem, and he add this (--modify-window 1) to the script and it did the trick.

rsync manpage

Code:

       --modify-window
              When comparing two timestamps, rsync treats the timestamps as being equal if they differ by no more than  the  modify-window  value.
              This  is  normally  0  (for  an  exact  match),  but  you  may  find it useful to set this to a larger value in some situations.  In
              particular, when transferring to or from an MS Windows FAT filesystem (which represents times with a  2-second  resolution),  --mod-
              ify-window=1 is useful (allowing times to differ by up to 1 second).

I think i will just format that drive to NTFS like it used to be and i'll keep you posted.

Davno · 08-19-2018, 11:02 PM

I don't think i understand exactly what rsync manpage says about FAT filesystem (which represents times with a 2-second resolution) but i did not want to add another option (--modify-window 1) to my script, so i formatted back to NTFS and everything works nicely now.