Re: booting from the other disk of a RAID-1
On Tue, Jun 28, 2011 at 10:36 AM, lee <lee@yun.yagibdah.de> wrote:
> martin f krafft <madduck@debian.org> writes:
>
>> also sprach lee <lee@yun.yagibdah.de> [2011.06.28.1115 +0200]:
>>> I'm glad it helped you and Peter. Now the question is how to actually
>>> solve the problem that one can boot from only one of the disks in a
>>> RAID-1 array. The point is to still be able to run the system when a
>>> disk fails. Should the one you boot from fail and you halt the system
>>> to replace it, how do you boot?
>>
>> Grub resides on all components of the array (ideally in their MBR).
>> It loads off any one of them and then runs its own RAID-assembly
>> code, which can assemble a degraded RAID-1. Then it loads kernel and
>> initrd from the filesystem on that array and passes control to the
>> kernel…
>
> Yes, that's what I was expecting. About two weeks ago, I had to replace
> the mainboard and found out that I can boot from only one of the disks
> in the RAID-1. Booting from the other one put me into a blank screen,
> without grub showing up.
>
> It doesn't work as it's supposed to. How can I fix it?
"dpkg-reconfigure grub-pc" and choose both disks when asked about
"grub install devices".
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