Re: grub fails to boot, prints only a single dot

[Andrei Borzenkov]

В Tue, 09 Jun 2015 13:38:27 -0400
Alex Regan <address@hidden> пишет:

> Hi,
> 
> >> Or copy the contents of /boot, format an individual partition, mount it
> >> on /boot, copy the data back, and run grub2-install?
> >
> > Yes. It makes sense to wipe out metadata to be sure (mdadm
> > --zero-superblock)
> 
> Okay, so I can do this for each of the two partitions, then run 
> grub2-install on both drives, correct?
> 

Yes. I would reduce existing md0 first and install on drive removed
from it leaving md0 intact. It makes it easy to rebuild it.

> This way, if the first drive fails, I can configure the BIOS to boot 
> using the second drive, correct?
> 

More or less. You would need to reconfigure BIOS even with MD RAID in
place. The only problem would be /boot in /etc/fstab, but I'm not sure
if /boot even needs to be mounted for normal operation.