hi, Am Mittwoch, den 28.01.2015, 18:39 +0800 schrieb Pillar Zuo: > devices.tar.xz is OK ,I can "xz -d devices.tar.xz".All of the file > is OK > for a test, try dropping the --device-part option completely from your command, then you know it has to do with this file ... if it still fails there is a more serious issue ... ciao oli