I have a Dell workstation model T3400 with 4 identical 500 GB drives configured as 3 ea in a RAID 5 array and the fourth as a hot spare. Windows 7 Professional x64 is installed and working fine. I shrunk the windows partition leaving 200 GB unassigned for the Ubuntu 12.04.2 install. From the live CD, I selected the install side by side option. The install proceeds to nearly the end when I get the following error:
Unable to install GRUB in /dev/sda Executing 'grub-install /dev/sda' failed This is a fatal error. OK
Dismissing that dialog brings up the dialog with the drop down to select other locations for GRUB. Alternatives are:
/dev/mapper/isw_bgfhjdbiig_PaulsRaid Linux device-mapper (raid45) (1.0 TB) /dev/mapper/isw_bgfhjdbiig_PaulsRaid1 Windows 7 (loader) /dev/mapper/isw_bgfhjdbiig_PaulsRaid2 /dev/mapper/isw_bgfhjdbiig_PaulsRaid5 /dev/mapper/isw_bgfhjdbiig_PaulsRaid3 Linux device-mapper (linear) (209.7 GB)
and some repeats...
Selecting any of them also fails to install GRUB.
I do think that Ubuntu is seeing the RAID array OK. If I open a terminal window and type "ls -l /dev/mapper" it returns the identical partion names listed in the drop down dialog. If I abort the install and reboot into windows, it now sees the 2 partitions put into the unused area by the Ubuntu installer and recognizes that they belong to another operating system.
Also, GParted is able to see the partitions created by the installer and/or to create partitions in the unused space with no problem.
I have also tried the "something else" install option and could create partitions and get to the same point of GRUB install failure.
It is my desire to use the Windows boot loader for the dual boot function. I have searched extensively, but could not find a solution to exactly this case.
I would appreciate any suggestions about how to proceed.