[Bug 8450] New: --link-dest seems not to work mounted NTFS file systems

[Henri Shustak]

Just to clarify, Is the destination file system NTFS?

Also, is this storage directly attached or is it mounted via the network?

Finally, you mentioned it is mounted read-only would you please clarify why the drive you are writing to is mounted in this way? 

Thanks.
Henri 

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> https://bugzilla.samba.org/show_bug.cgi?id=8450
> 
>           Summary: --link-dest seems not to work mounted NTFS file
>                    systems
>           Product: rsync
>           Version: 3.0.8
>          Platform: x86
>        OS/Version: Linux
>            Status: NEW
>          Severity: normal
>          Priority: P5
>         Component: core
>        AssignedTo: wayned at samba.org
>        ReportedBy: toralf.foerster at gmx.de
>         QAContact: rsync-qa at samba.org
> 
> 
> I use rsync to create daily/weekly/monthly backups to an external USB drive of
> my Gentoo Linux using this command line options :
> 
> --archive --delete --delete-excluded --exclude-from=/exclude.list
> --link-dest=<old dest> --stats --verbose <src> <dest>
> 
> This works like a charm for all files located on my ext3 Linux partition.
> However for the 2 files of a NTFS drive not.
> 
> Here rsync always transfers an unchanged file too, even if <old dest> contains
> that file (from a backup made yesterday) and therefore it should better be
> hard-linked only instead of being transferred twice.
> 
> What is really curious - at the beginning of using this backup solution (some
> weeks ago) the <dest> doesn't contain an older version of that file, and there
> hard-linking worked IIRC.
> 
> The NTFS drive is mounted read-only:
> 
> tfoerste at n22 ~ $ mount | grep C
> /dev/sda1 on /mnt/C type ntfs
> (ro,noexec,nosuid,nodev,noatime,uid=1000,gid=100,umask=0027)
> 
> <src>      is /mnt/C/notes/data/archive/
> <dest>     is /mnt/media/daily/f/
> <old dest> is /mnt/media/weekly/b (given as ../../weekly/b at the command line)
> 
> Here you can see that different hard links are used :
> 
> tfoerste at n22 ~ $ ls -il /mnt/C/notes/data/archive/l_DE1448.nsf
> /mnt/media/daily/f/archive/l_DE1448.nsf 
> /mnt/media/weekly/b/archive/l_DE1448.nsf 
>  80719 -r-xr-x--- 1 tfoerste users 8126464 Sep  2 13:40
> /mnt/C/notes/data/archive/l_DE1448.nsf
> 2293796 -r-xr-x--- 1 tfoerste users 8126464 Sep  2 13:40
> /mnt/media/daily/f/archive/l_DE1448.nsf
> 2310874 -r-xr-x--- 1 tfoerste users 8126464 Sep  2 13:40
> /mnt/media/weekly/b/archive/l_DE1448.nsf
> 
> md5sum proves identical content, the file attributes shouldn't changed too
> (NTFS is always mounted read-only, never read-write) :
> 
> tfoerste at n22 ~ $ md5sum /mnt/C/notes/data/archive/l_DE1448.nsf
> /mnt/media/daily/f/archive/l_DE1448.nsf 
> /mnt/media/weekly/b/archive/l_DE1448.nsf 
> 88ef0d516c5696bf120d749f4b1fc9ba  /mnt/C/notes/data/archive/l_DE1448.nsf
> 88ef0d516c5696bf120d749f4b1fc9ba  /mnt/media/daily/f/archive/l_DE1448.nsf
> 88ef0d516c5696bf120d749f4b1fc9ba  /mnt/media/weekly/b/archive/l_DE1448.nsf
> 
> OTOH does it make any difference whether the <dest> drive at the external USB
> drive is mounted as ext2 instead of ext3 ?
> 
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