i just rsync'd 18gb of data with
rsync -avz ...
and got finally
sent 8042231852 bytes received 37855 bytes 8127609.61 bytes/sec
total size is 16602927344 speedup is 2.06
rsync error: some files/attrs were not transferred (see previous errors)
(code 23) at main.c(1057) [sender=3.0.6]
after 18g with -v there's not much of previous errors to be seen, since
it exceeds the common buffer size.
thus, it would be nice, if rsync could keep a log of occuring errors and
print it out at the end. making it easy to find the offending files.