Re: Grub2 "unknown filesystem"

[Andrei Borzenkov]

30.11.2015 20:44, Avi Deitcher пишет:
> Well, you were right. Rod Smith of rodsbooks.com suggested the same thing
> in an email.
> 
> 1- I moved some data from two larger partitions in the first 2TB onto other
> data partitions later in the disk.
> 2- I rebuilt the CentOS 6.6 /boot in a new 1GB partition in the first 2TB
> 3- I rebooted into grub2 command-line, lo and behold, it sees the
> filesystem.
> 
> Thank you, Andrei.
> 
> Now, if only I could figure out why os-prober will not create menu entries
> for that /boot....
> 

os-prober first needs to detect root of another OS. I understand that
you have LVM install - unless VG for another OS is active, os-prober
won't see it. It does not activate volumes itself.