On 5/5/2017 3:45 μμ, Gianluca Cecchi wrote:
BTW: see also this paragraph in the provided RH EL link:
24.7.3. Resetting and Reinstalling GRUB 2
But i think is not your problem....
Yes, I have done that, without change in behavior.
Also, after changing partitions flag does your fdisk command reflect the
change?
Yes.
Is the error during boot the same as the one provided in your first e-mail?
Yes.
One final thing. When I had to change boot settings, I made different steps
in choot environment in respect of the indication inside the image you sent.
Specifically
Verify if your boot partition is already mounted under /mnt/sysimage/boot
in your current environment
Yes, it is:
sh-4.2# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/live-rw 2.0G 1.1G 930M 54% /
devtmpfs 979M 0 979M 0% /dev
tmpfs 1001M 4.0K 1001M 1% /dev/shm
tmpfs 1001M 8.3M 993M 1% /run
tmpfs 1001M 0 1001M 0% /sys/fs/cgroup
/dev/sr0 680M 680M 0 100% /run/install/repo
tmpfs 1001M 300K 1001M 1% /tmp
/dev/mapper/centos-root 18G 1.5G 16G 9% /mnt/sysimage
/dev/vdal 497M 192M 306M 39% /mnt/sysimage/boot
/tmpfs 1001M 0 1001M 0% /mnt/sysimage/dev/shm
If it is mounted on another mount point in your live env go and umount it
and run
mount /dev/vda1 /mnt/sysimage/boot
Didn't need to.
then
chroot /mnt/sysimage
OK, I did so:
sh-4.2# chroot /mnt/sysimage
bash-4.2#
when you are in chrooted environment, probably you don't have special files
for vda and vda1 because they are dinamically created;
verify with
ls -l /dev/vda*
It seems I do have such files:
bash-4.2# ls -la /dev/vda*
brw-rw----. 1 root disk 252, 0 May 5 16:49 vda
brw-rw----. 1 root disk 252, 1 May 5 16:49 vdal
brw-rw----. 1 root disk 252, 2 May 5 16:49 vda2
If this is the case, go and create them
mknod -m 660 /dev/vda b 253 0
mknod -m 660 /dev/vda1 b 253 1
Didn't need to.
at this point
grub2-install /dev/vda
and let see the output of the command and its exit code
As usual:
bash-4.2# grub2-install /dev/vda
Installing for i386-pc platform.
grub2-install: error: unknown filesystem.
at this point exit chrooted environment (exit)
umount /mnt/sysimage/boot
reboot and see if anything changes
Didn't do it, because grub2-install above failed, so nothing changed.
I am very puzzled with "unknown filesystem".
Thanks for your time and help! I am looking forward to reaching a solution!
All the best,
Nick
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