OK - I think this should be fixed. Running rsync -aA on a file system that doesn't support ACLs I get: send_acl: sys_acl_get_file(mysql, SMB_ACL_TYPE_ACCESS): Operation not supported rsync error: some files could not be transferred (code 23) at main.c(789) And - it aborts. Seems to me it should warn but continue to copy the files anyway ignoring the ACLs.