Comment 23 for bug 1012629

@david-partain, this has been fixed in trusty, what you are experiencing is a new bug altogether.

I was able to verify that forcing the bootdev in the preseed file does indeed force grub to install onto /dev/sdb when using the non-netboot install.

However, when using the same preseed file with the netboot install I experienced the issue david-partain is complaining about. The grub-installer stage creates a red screen with the error message

"Unable to install Grub in /dev/sdb Executing 'grub-install /dev/sdb' failed.

This is a fatal error
"

Looking at virtual terminal 4 there is an error message
"grub-install: error: unable to identify a filesystem in hostdisk//dev/sdb; safety check can't be performed."

I'm not yet certain why the server iso works, and the netboot iso fails.

@david-partain, can you check the virtual terminal to see if you are getting the same error?