The target VM has two virtual IDE drives, sda (8 GB) for / and sdb (0.5GB) for /boot. Installation proceded normally until time to install the bootloader, which failed. Pop-up window said bootloader installation failed, and I chose to continue anyway in order to acquire as much log information as possible. >From the anaconda log: 09:27:23,458 INFO anaconda: Installing boot loader 09:27:23,458 INFO anaconda: boot loader stage1 target device is sda 09:27:23,458 INFO anaconda: boot loader stage2 target device is sdb1 09:27:23,473 DEBUG anaconda: new default image: <pyanaconda.bootloader.LinuxBootLoaderImage object at 0x7fef11ae3860> 09:27:23,619 WARN anaconda: /usr/lib64/python3.5/site-packages/pyanaconda/bootloader.py:839: PendingDeprecationWarning: use len(mi) instead setup_args = cfg_obj.dracutSetupArgs() 09:27:24,590 INFO anaconda: bootloader.py: mbr will be updated for grub2 09:27:39,185 INFO anaconda: bootloader.py: used boot args: rhgb quiet 09:27:42,393 ERR anaconda: bootloader.write failed: boot loader install failed 09:27:42,409 WARN anaconda: /usr/lib64/python3.5/site-packages/pyanaconda/ui/gui/__init__.py:929: PyGTKDeprecationWarning: The keyword(s) "message_format" have been deprecated in favor of "text" respectively. See: https://wiki.gnome.org/PyGObject/InitializerDeprecations message_format=message) 09:27:42,411 WARN anaconda: /usr/lib64/python3.5/site-packages/pyanaconda/ui/gui/__init__.py:929: PyGTKDeprecationWarning: The "flags" argument for dialog construction is deprecated. Please use initializer keywords: modal=True and/or destroy_with_parent=True. See: https://wiki.gnome.org/PyGObject/InitializerDeprecations message_format=message) 09:28:15,652 WARN anaconda: /usr/lib64/python3.5/site-packages/gi/overrides/GObject.py:541: Warning: gsignal.c:2635: instance '0x55bc6606e370' has no handler with id '54645' return func(*args, **kwargs) 09:28:15,652 WARN anaconda: /usr/lib64/python3.5/site-packages/gi/overrides/GObject.py:541: Warning: gsignal.c:2635: instance '0x55bc6606e370' has no handler with id '54646' return func(*args, **kwargs) 09:28:15,652 INFO anaconda: Installing boot loader -- DONE 09:28:15,653 INFO anaconda: Performing post-installation setup tasks 09:28:16,490 WARN anaconda: /usr/lib64/python3.5/site-packages/pyanaconda/packaging/__init__.py:662: PendingDeprecationWarning: use len(mi) instead self._setDefaultBootTarget() 09:28:16,492 INFO anaconda: Performing post-installation setup tasks -- DONE Files in the /boot filesystem (mounted at x) look normal... example: [root@puget ryniker]# ls -lR x x: total 88480 -rw-------. 1 root root 3585929 Aug 19 10:44 System.map-4.8.0-0.rc2.git3.1.fc25.x86_64 -rw-r--r--. 1 root root 179364 Aug 19 10:44 config-4.8.0-0.rc2.git3.1.fc25.x86_64 drwx------. 4 root root 4096 Aug 24 22:28 efi -rw-r--r--. 1 root root 184380 Apr 5 05:38 elf-memtest86+-5.01 drwxr-xr-x. 2 root root 4096 Aug 24 22:20 extlinux drwxr-xr-x. 6 root root 4096 Sep 12 09:28 grub2 -rw-------. 1 root root 54575425 Sep 12 09:27 initramfs-0-rescue-8c18cf8c0b2d481d99d1ec2aa45eb324.img -rw-------. 1 root root 16920290 Sep 12 09:28 initramfs-4.8.0-0.rc2.git3.1.fc25.x86_64.img drwx------. 2 root root 16384 Sep 12 09:23 lost+found -rw-r--r--. 1 root root 182704 Apr 5 05:38 memtest86+-5.01 -rwxr-xr-x. 1 root root 7466536 Sep 12 09:27 vmlinuz-0-rescue-8c18cf8c0b2d481d99d1ec2aa45eb324 -rwxr-xr-x. 1 root root 7466536 Aug 19 10:45 vmlinuz-4.8.0-0.rc2.git3.1.fc25.x86_64 x/efi: total 12 drwxr-xr-x. 4 root root 4096 Aug 24 22:21 EFI drwxr-xr-x. 3 root root 4096 Aug 24 22:28 System -rw-r--r--. 1 root root 34 Feb 4 2016 mach_kernel x/efi/EFI: total 8 drwxr-xr-x. 2 root root 4096 Aug 24 22:21 BOOT drwxr-xr-x. 4 root root 4096 Sep 12 09:27 fedora x/efi/EFI/BOOT: total 1332 -rw-r--r--. 1 root root 1293304 Feb 17 2015 BOOTX64.EFI -rw-r--r--. 1 root root 66104 Feb 17 2015 fallback.efi x/efi/EFI/fedora: total 5812 -rw-r--r--. 1 root root 102 Feb 17 2015 BOOT.CSV -rw-r--r--. 1 root root 1276224 Feb 17 2015 MokManager.efi drwxr-xr-x. 2 root root 4096 Aug 24 22:27 fonts drwxr-xr-x. 2 root root 4096 Aug 17 13:31 fw -rwxr-xr-x. 1 root root 70864 Aug 17 13:31 fwupx64.efi -rwxr-xr-x. 1 root root 998216 Jun 10 14:31 gcdx64.efi -rw-r--r--. 1 root root 1024 Sep 12 09:28 grubenv -rwxr-xr-x. 1 root root 998216 Jun 10 14:31 grubx64.efi -rw-r--r--. 1 root root 1287032 Feb 17 2015 shim-fedora.efi -rw-r--r--. 1 root root 1293304 Feb 17 2015 shim.efi ... x/grub2: total 36 -rw-r--r--. 1 root root 124 Sep 12 09:27 device.map drwxr-xr-x. 2 root root 4096 Sep 12 09:27 fonts -rw-r--r--. 1 root root 4127 Sep 12 09:28 grub.cfg lrwxrwxrwx. 1 root root 28 Jun 10 14:31 grubenv -> /boot/efi/EFI/fedora/grubenv drwxr-xr-x. 2 root root 12288 Sep 12 09:27 i386-pc drwxr-xr-x. 2 root root 4096 Sep 12 09:27 locale drwxr-xr-x. 3 root root 4096 May 9 2012 themes x/grub2/fonts: total 1316 -rw-r--r--. 1 root root 1343654 Sep 12 09:27 unicode.pf2 x/grub2/i386-pc: total 2388 -rw-r--r--. 1 root root 10652 Sep 12 09:27 acpi.mod -rw-r--r--. 1 root root 1324 Sep 12 09:27 adler32.mod -rw-r--r--. 1 root root 5652 Sep 12 09:27 affs.mod -rw-r--r--. 1 root root 6108 Sep 12 09:27 afs.mod -rw-r--r--. 1 root root 15892 Sep 12 09:27 ahci.mod -rw-r--r--. 1 root root 704 Sep 12 09:27 all_video.mod -rw-r--r--. 1 root root 1036 Sep 12 09:27 aout.mod -rw-r--r--. 1 root root 2940 Sep 12 09:27 archelp.mod -rw-r--r--. 1 root root 4284 Sep 12 09:27 at_keyboard.mod -rw-r--r--. 1 root root 5636 Sep 12 09:27 ata.mod -rw-r--r--. 1 root root 1640 Sep 12 09:27 backtrace.mod -rw-r--r--. 1 root root 6752 Sep 12 09:27 bfs.mod -rw-r--r--. 1 root root 4692 Sep 12 09:27 biosdisk.mod -rw-r--r--. 1 root root 2256 Sep 12 09:27 bitmap.mod -rw-r--r--. 1 root root 3800 Sep 12 09:27 bitmap_scale.mod The full log data is available at: http://ryniker.org/Fedora/anaconda/ Suggestions? I could report a bug against anaconda, but I feel I might have done something silly. Also, before I cry bug, I would want to check if a similar thing occurs on real hardware. Is there more specific information somewhere about what write caused: 09:27:42,393 ERR anaconda: bootloader.write failed: boot loader install failed -- test mailing list test@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe: https://lists.fedoraproject.org/admin/lists/test@xxxxxxxxxxxxxxxxxxxxxxx