Comment 3 for bug 873500

Oct 13 12:17:26 ubuntu ubiquity: Error: /dev/sda: unrecognised disk label
Oct 13 12:17:26 ubuntu ubiquity: grub-probe: error: unknown filesystem.
Oct 13 12:17:26 ubuntu grub-installer: info: Installing grub on '/dev/sda'
Oct 13 12:17:26 ubuntu grub-installer: info: grub-install supports --no-floppy
Oct 13 12:17:26 ubuntu grub-installer: info: Running chroot /target grub-install --no-floppy --force "/dev/sda"
Oct 13 12:17:28 ubuntu grub-installer: /usr/sbin/grub-setup: error: unable to identify a filesystem in hd0; safety check can't be performed.
Oct 13 12:17:28 ubuntu grub-installer: error: Running 'grub-install --no-floppy --force "/dev/sda"' failed.
Oct 13 12:54:36 ubuntu activate-dmraid: No Serial ATA RAID disks detected
Oct 13 12:54:36 ubuntu ubiquity[7119]: Reverting lockdown of the desktop environment.
Oct 13 12:54:38 ubuntu ubiquity: umount: /target: device is busy.
Oct 13 12:54:38 ubuntu ubiquity: (In some cases useful info about processes that use
Oct 13 12:54:38 ubuntu ubiquity: the device is found by lsof(8) or fuser(1))
Oct 13 12:54:38 ubuntu ubiquity[7119]: Traceback (most recent call last):
Oct 13 12:54:38 ubuntu ubiquity[7119]: File "/usr/lib/ubiquity/ubiquity/misc.py", line 193, in boot_device
Oct 13 12:54:38 ubuntu ubiquity[7119]: for disk in p.disks():
Oct 13 12:54:38 ubuntu ubiquity[7119]: File "/usr/lib/ubiquity/ubiquity/parted_server.py", line 153, in disks
Oct 13 12:54:38 ubuntu ubiquity[7119]: disks = os.listdir(devices)
Oct 13 12:54:38 ubuntu ubiquity[7119]: OSError: [Errno 2] No such file or directory: '/var/lib/partman/devices'
Oct 13 12:54:38 ubuntu ubiquity[7119]:
Oct 13 12:54:38 ubuntu ubiquity[7119]: debconffilter_done: ubi-partman (current: ubi-partman)