Ahh, you have built the array using the whole disks. You can't do that.
The disks have to have a partition table and room to install grub. You
will need to partition them first, then use partitions to build the
array.
** Changed in: grub-installer (Ubuntu)
Status: New => Invalid
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You
Retried after resync'ing to most recent live image.
When installer got to the
Executing 'grub-install /dev/vda' failed.
This is a fatal error.
Did not press ok this time, but ran the following:
ubuntu@ubuntu:~$ sudo chroot /target apt-get install mdadm
ubuntu@ubuntu:~$ sudo chroot /target grub-
You should be installing grub to the individual boot disk(s) rather than
the array.
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https://bugs.launchpad.net/bugs/1170584
Title:
installer unresponsive after attempting grub installa
Error message most likely was a result of mdadm missing from /target.
But UI shouldn't hang then.
$ sudo mount --bind /run/resolvconf/resolv.conf /target/etc/resolv.conf
$ sudo chroot /target apt-get install mdadm
$ sudo chroot /target grub-install /dev/md_d2
Installation finished. No error report
** Description changed:
1. boot to livecd (desktop)
- 2. a) $ sudo apt-get install mdadm # not certain whether this part was needed
+ 2. a) $ sudo apt-get install mdadm
2. b) $ sudo mdadm -C /dev/md_d2 -l 1 -n 1 -f -x 2 /dev/vd[abc]
3. run installer, tell it to use entire md_d2 disk for lvm