Comment # 2 on bug 907457 from Martin Pluskal

(In reply to Steffen Winterfeldt from comment #1)
> You 'forgot' to mention that you also changed your disks in between.
Well actually I only created partition table on /dev/sdb, otherwise disks are
same as when system was installed.

I also forgot to mention that installation was from USB flash - therefore when
system was installed, there were sda,sdb and sdc present
> 
> But it's not clear why the 2nd disk doesn't show up in device.map.
> 
> Anyway, the file is created by grub2 but not strictly necessary, afaik. So
> we might just make this message a warning.
> 
> Michael, what do you think? Can we ignore this?