cannot install grub into any partition in a RAID 0 config. used to work before now the installer will crash

[NightRider]

grub cannot be installed into the harddrive and ubuntu installer chrasshes after it fails to install it

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: ubiquity 2.9.23
ProcVersionSignature: Ubuntu 3.2.0-17.27-generic-pae 3.2.6
Uname: Linux 3.2.0-17-generic-pae i686
ApportVersion: 1.93-0ubuntu2
Architecture: i386
CasperVersion: 1.305
Date: Thu Mar 8 10:51:31 2012
InstallCmdLine: noprompt cdrom-detect/try-usb=true file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity
LiveMediaBuild: Ubuntu 12.04 LTS "Precise Pangolin" - Beta i386 (20120301)
ProcEnviron:
 TERM=unknown
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Ubuntu Foundations Team Bug Bot (crichton)]

Exception during installation:
Mar 8 18:51:26 ubuntu plugininstall.py: Traceback (most recent call last):
Mar 8 18:51:26 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 1690, in <module>
Mar 8 18:51:26 ubuntu plugininstall.py: install.run()
Mar 8 18:51:26 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 55, in wrapper
Mar 8 18:51:26 ubuntu plugininstall.py: func(self)
Mar 8 18:51:26 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 204, in run
Mar 8 18:51:26 ubuntu plugininstall.py: self.configure_bootloader()
Mar 8 18:51:26 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 988, in configure_bootloader
Mar 8 18:51:26 ubuntu plugininstall.py: "GrubInstaller failed with code %d" % ret)
Mar 8 18:51:26 ubuntu plugininstall.py: InstallStepError: GrubInstaller failed with code 1
Mar 8 18:51:26 ubuntu plugininstall.py:

[Brian Murray (brian-murray)]

Mar 8 18:50:05 ubuntu grub-installer: info: architecture: i386/generic
Mar 8 18:50:06 ubuntu grub-installer: info: Identified partition label for /dev/mapper/isw_ddgfabagjj_RAID0HP3: loop
Mar 8 18:50:08 ubuntu grub-installer: dpkg: warning: there's no installed package matching grub
Mar 8 18:50:08 ubuntu grub-installer: dpkg: warning: there's no installed package matching grub-legacy
Mar 8 18:50:08 ubuntu grub-installer: dpkg: warning: there's no installed package matching grub-efi
Mar 8 18:50:08 ubuntu grub-installer: dpkg: warning: there's no installed package matching grub-efi-amd64-bin
Mar 8 18:50:08 ubuntu grub-installer: dpkg: warning: there's no installed package matching grub-efi-amd64
Mar 8 18:50:08 ubuntu grub-installer: dpkg: warning: there's no installed package matching grub-efi-ia32-bin
Mar 8 18:50:08 ubuntu grub-installer: dpkg: warning: there's no installed package matching grub-efi-ia32
Mar 8 18:50:08 ubuntu ubiquity: Error:
Mar 8 18:50:08 ubuntu ubiquity: Can't have a partition outside the disk!
Mar 8 18:50:09 ubuntu ubiquity: grub-probe: error: unknown filesystem.
Mar 8 18:50:09 ubuntu grub-installer: info: Installing grub on '/dev/sda'
Mar 8 18:50:09 ubuntu grub-installer: info: grub-install supports --no-floppy
Mar 8 18:50:09 ubuntu grub-installer: info: Running chroot /target grub-install --no-floppy --force "/dev/sda"
Mar 8 18:50:12 ubuntu grub-installer: Installation finished. No error reported.
Mar 8 18:50:12 ubuntu grub-installer: info: grub-install ran successfully
Mar 8 18:50:12 ubuntu ubiquity: Can't read partition table from /dev/sda

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.