Operation not supported (95)

[Albert Berger]

Greetings!

During migrating i686 installation of ArchLinux to x86_64, all filesystem was rsynced to a new location. Maybe this somehow relates to the problem that has appeared after migrating and that did not happen before: during backuping the system, rsync reports the following error message:

    rsync: set_acl: sys_acl_delete_def_file(var/log/journal/remote): Operation not supported (95)

The full log is as follows:

[root at kw al]# /usr/bin/rsync --update -DHAErlptgo --relative --delete-during --verbose --itemize-changes /var/log/journal /mnt/backup/rootdir/
sending incremental file list
rsync: set_acl: sys_acl_delete_def_file(var/log/journal/remote): Operation not supported (95)
.d..t...... /var/log/
.d..tp..... /var/log/journal/
.d...p..... /var/log/journal/c892f90078ad480d902f236dfd220532/
>f..t...... /var/log/journal/c892f90078ad480d902f236dfd220532/system.journal
>f..t...... /var/log/journal/c892f90078ad480d902f236dfd220532/user-1000.journal
cd+++++++++ /var/log/journal/remote/

sent 16,782,653 bytes  received 169 bytes  6,713,128.80 bytes/sec
total size is 119,537,664  speedup is 7.12
rsync error: some files/attrs were not transferred (see previous errors) (code 23) at main.c(1178) [sender=3.1.2]

The 'remote' directory is empty on both source and destination. After deleting 'remote' directory on destination, it's recreated and the same error is reported. The source filesystem is ext4, the destination is on btrfs and is accessed via samba. Why can this message happen and how can this be corrected?

Thanks.

Albert.