Re: GRUB2, GPT, mdadm & LVM

[Chris Murphy]

On Jul 18, 2013, at 12:50 PM, Sander Smeenk <address@hidden> wrote:

---alot more snipped---
> + partmap_module= part_gpt part_gpt part_gpt part_gpt part_gpt part_gpt 
> part_gpt part_gpt part_gpt part_gpt part_gpt part_gpt part_gpt part_gpt 
> part_gpt part_gpt


Seems like a lot of instances of part_gpt. And then I see:

> 
> /usr/sbin/grub-bios-setup: info: Inserting hostdisk//dev/sdp into md/0 
> (mdraid1x)


/dev/sda through /dev/sdp are inserted into md/0 by grub-bios-setup. That's at 
11 disk RAID 6? I defer to Andrey if that's even supportable. 

In GRUB rescue, does it list all 11 drives with the ls command? I wonder if md0 
is invalid, despite being listed. Or if it's short one or two drives and in 
effect is degraded. I think this is an extremely fragile arrangement. You're 
better off with /boot on a 2 or 3 disk RAID1, and duplicate GRUB core.img in 
each of their BIOS boot partitions.


Chris Murphy