(In reply to Michel Normand from comment #3) > [CUT] > > I would need help to continue investigation. if I try to chroot to /mnt and kill hung ofpathname then parent is making cleanup that umount, so unable to manually call ofpathname to better understand original hung failure. === 2:linux-ac6f:~ # chroot /mnt linux-ac6f:/ # ps axf ... 17473 pts/0 S+ 0:00 | \_ /usr/sbin/grub2-install --target=powerpc-ieee1275 --force --skip-fs-probe /dev/disk/by-id/scsi-0QEMU_QEMU_HARDDISK_mpath1-part1 17489 pts/0 S+ 0:00 | \_ /bin/bash /usr/sbin/ofpathname /dev/mapper/0QEMU_QEMU_HARDDISK_mpath1 17505 pts/0 S+ 1:38 | \_ /bin/bash /usr/sbin/ofpathname /dev/mapper/0QEMU_QEMU_HARDDISK_mpath1 ... linux-ac6f:/ # kill -9 17505 linux-ac6f:/ # ls /usr/sbin/ofpathname /usr/sbin/ofpathname linux-ac6f:/ # /bin/bash /usr/sbin/ofpathname /dev/mapper/0QEMU_QEMU_HARDDISK_mpath1 sed: can't read /proc/cpuinfo: No such file or directory grep: /proc/cpuinfo: No such file or directory grep: /proc/cpuinfo: No such file or directory grep: /proc/cpuinfo: No such file or directory /usr/bin/find: '/sys/class/net': No such file or directory ofpathname: Could not retrieve Open Firmware device path for logical device "/dev/mapper/0QEMU_QEMU_HARDDISK_mpath1". ===