Re: grub2-install: Couldn't find physical volume ‘(null)’.

[Andrei Borzenkov]

11.04.2016 05:03, Sam Varshavchik пишет:
> grub 2.02, Fedora x86-64.
> 
> I have /dev/sda and /dev/sdb in a RAID-1 configuration. This is the
> Linux kernel's md-raid driver.
> 
> /dev/sda started failing SMART.
> 
> I ran /sbin/grub2-install /dev/sdb. My recollection is that it ran
> without any complaints.
> 
> After that, I yanked out /dev/sda. I reattached /dev/sdb as /dev/sda,
> and put in a new hard drive as the new /dev/sdb.
> 
> I booted up, and kicked off a rebuild of my RAID-1 volumes, everything
> is going well.
> 
> Now, after all of that was done, I decided to install grub2 on the new
> /dev/sdb:
> 
> address@hidden ~]# /sbin/grub2-install /dev/sdb
> Installing for i386-pc platform.
> /sbin/grub2-install: warning: Couldn't find physical volume ‘(null)’.
> Some modules may be missing from core image..
> /sbin/grub2-install: warning: Couldn't find physical volume ‘(null)’.
> Some modules may be missing from core image..
> Installation finished. No error reported.
> 
> Now, anyone have any idea what's up with these warnings?
> 

Could you show output of "mdadm --detail" for your MD device?

> More importantly, should I dare to run /sbin/grub2-install /dev/sda,
> just to make sure everything is nicely in sync?
> 
> P.S., currently I still have one raid volume syncing, but this does not
> appear relevant.
> 
> 
> 
> 
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