installation - Bootloader install failed - RAID

I am trying to install Ubuntu 13.04 on a desktop with hardware raid (3 disks in raid 5). I believe I have an ICH8 chipset, if that is relevant.

So, I created an install USB stick with Startup Disk Creator with the amd64 Ubuntu Desktop image. I proceed through the install, select to erase everything and install Ubuntu (no lvm, no encryption, or anything like that). The install seems to go fine, until the very end, I get an Error that says "Failed to install GRUB"

Unable to install GRUB in

I think it initially tried /dev/sda, but then I got a menu where I could select a net partition. I tried other selections, but nothing seemed to work. Do I need to unmount something to install GRUB?

Screenshot with other install path candidates:

Bootloader install failed

Here is the output of ls -l /dev/mapper

ubuntu@ubuntu:~$ ls -l /dev/mapper
total 0

crw------- 1 root root  10, 236 Aug 25 06:48 control
brw-rw---- 1 root disk 252,   0 Aug 25 14:17 isw_bifaeaafcc_Volume0
brw-rw---- 1 root disk 252,   1 Aug 25 14:17 isw_bifaeaafcc_Volume0p1
brw-rw---- 1 root disk 252,   2 Aug 25 14:17 isw_bifaeaafcc_Volume0p2
brw-rw---- 1 root disk 252,   3 Aug 25 14:17 isw_bifaeaafcc_Volume0p5
ubuntu@ubuntu:~$

I eventually selected "Continue without a bootloader." in hopes that I can figure out how to install GRUB post-install.

Any ideas on getting GRUB installed, so this system will boot? Please let me know if you need any further details or system specs.

EDIT: Here is the output from /var/log/syslog during the failure

Aug 25 23:03:50 ubuntu grub-installer: info: architecture: amd64/generic
Aug 25 23:03:50 ubuntu grub-installer: info: Mounting /proc into /target
Aug 25 23:03:50 ubuntu ubiquity: grub-probe: error: failed to get canonical path of /dev/mapper/isw_bifaeaafcc_Volume0p1.
Aug 25 23:03:51 ubuntu ubiquity: grub-probe: error:
Aug 25 23:03:51 ubuntu ubiquity:  
Aug 25 23:03:51 ubuntu ubiquity: failed to get canonical path of /dev/mapper/isw_bifaeaafcc_Volume0p1

Aug 25 23:03:51 ubuntu ubiquity: .
Aug 25 23:03:51 ubuntu ubiquity: File descriptor 3 (pipe:[140038]) leaked on lvdisplay invocation.
Aug 25 23:03:51 ubuntu ubiquity:  Parent PID 17588: /bin/sh
Aug 25 23:03:51 ubuntu ubiquity:   
Aug 25 23:03:51 ubuntu ubiquity: Volume group "isw_bifaeaafcc_Volume0p1" not found
Aug 25 23:03:51 ubuntu ubiquity: 
Aug 25 23:03:51 ubuntu ubiquity:   
Aug 25 23:03:51 ubuntu ubiquity: Skipping volume group isw_bifaeaafcc_Volume0p1
Aug 25 23:03:51 ubuntu ubiquity: 
Aug 25 23:03:51 ubuntu grub-installer: info: Identified partition label for /dev/mapper/isw_bifaeaafcc_Volume0p1: loop

Aug 25 23:03:52 ubuntu grub-installer: dpkg: warning: ignoring request to remove grub which isn't installed
Aug 25 23:03:52 ubuntu grub-installer: dpGkg: warning: ignoring request to remove grub-legacy which isn't installed
Aug 25 23:03:52 ubuntu grub-installer: dpkg: warning: ignoring request to remove grub-efi which isn't installed
Aug 25 23:03:52 ubuntu grub-installer: dpkg: warning: ignoring request to remove grub-efi-amd64-bin which isn't installed
Aug 25 23:03:52 ubuntu grub-installer: dpkg: warning: ignoring request to remove grub-efi-amd64 which isn't installed
Aug 25 23:03:52 ubuntu grub-installer: dpkg: warning: ignoring request to remove grub-efi-amd64-signed which isn't installed
Aug 25 23:03:52 ubuntu grub-installer: dpkg: warning: ignoring request to remove grub-efi-ia32-bin which isn't installed
Aug 25 23:03:52 ubuntu grub-installer: dpkg: warning: ignoring request to remove grub-efi-ia32 which isn't installed
Aug 25 23:03:53 ubuntu grub-installer: info: Installing grub on '/dev/mapper/isw_bifaeaafcc_Volume0p1'
Aug 25 23:03:53 ubuntu grub-installer: info: grub-install does not support --no-floppy

Aug 25 23:03:53 ubuntu grub-installer: info: Running chroot /target grub-install  --force "/dev/mapper/isw_bifaeaafcc_Volume0p1"
Aug 25 23:03:54 ubuntu grub-installer: Path `/boot/grub' is not readable by GRUB on boot. Installation is impossible. Aborting.
Aug 25 23:03:54 ubuntu grub-installer: error: Running 'grub-install  --force "/dev/mapper/isw_bifaeaafcc_Volume0p1"' failed.