Reason of this "message bug" is: search line with "###" !
========== Output ===================== root@machine:/home/user# dd if=/dev/zero of=/dev/sdb status=progress bs=128M dd: write error '/dev/sdb': No free space on device 9+0 got records 8+0 sent records 1073741824 bytes (1,1 GB, 1,0 GiB) copied, 0,962915 s, 1,1 GB/s root@machine:/home/user# parted --machine /dev/sdb unit B print free quit Ошибка: /dev/sdb: метка диска не определена ###: (translated: "Error: /dev/sdb: label of disk not defined") BYT; /dev/sdb:1073741824B:scsi:512:512:unknown:VMware, VMware Virtual S:; root@machine:/home/user# $? 0: command not found root@machine:/home/user# parted --version parted (GNU parted) 3.2 Copyright © 2014 Free Software Foundation, Inc. Лицензия GPLv3+: GNU GPL версии 3 или новее < http://gnu.org/licenses/gpl.html> Это свободное ПО: вы можете продавать и распространять его. Нет НИКАКИХ ГАРАНТИЙ до степени, разрешённой законом. Автор программы — < http://git.debian.org/?p=parted/parted.git;a=blob_plain;f=AUTHORS>. root@machine:/home/user# uname -a Linux machine 4.15.0-34-generic #37-Ubuntu SMP Mon Aug 27 15:21:48 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux ============= End Output ============================== I think, that the message "###" is not a error, because: 1. already undestand, that the disk cant have disk table and do not have labels of partitions (already="unknown" table) 2. for "--machine" output need strong/constantly output, without "sudden messages" (without ";" at end of line) Please remove this message from stderr - it is not a error and this message hinder to "--machine" output!