after Update stuck in grub rescue

[cynric10]

hello,
So I've had a bunch of updates to install today and had the same experience as others before had in here:

https://forum.proxmox.com/threads/proxmox-update-from-7-2-4-grub-update-failure.114951/
I canceld the installation by selecting "NO" and OK. After that no new updates were found, so I rebooted my machine. After that I was stuck at the following line:

GRUB Ioading..
Welcome to GRUB!
error: disk 'lvmid/vdgMZq-fOiz-tssQ-83iX-bdMX-EUuZ-USGkPfzajfm9e-14Cq-CB00e-eg5d-
jitY-1U1b-tCMKsf' not found.
grub rescue> ls
(hd0) (hd0,gpt3) (hd0,gpt2) (hd0,gpt1) (hd1) (hd1,gpt2) (hd1,gpt1) (hd2) (hd2,gp
t1) (hd3) (hd3,gpt2) (hd3,gpt1)
grub rescue>

After creating a boot stick and running the rescue mode, I got the following error:
Code:

error: no such device: rpool.
ERROR: unable to find boot disk automatically.

Press any
key to continue...

so I can't boot to the rescue mode.

I also tried the following solution from @Stoiko Ivanov:

https://pve.proxmox.com/wiki/ZFS:_S...iring_a_System_Stuck_in_the_GRUB_Rescue_Shell

where I get the error:

cannot import 'rpool': no such pool available

So now I'm still in the debugger mode and these are the results from:

lsblk
zpool import
* the grub-screen you're seeing when trying to boot
Thanks for all your help, I'm a bit stuck here.

 

[Stoiko Ivanov]

GRUB Ioading.. Welcome to GRUB! error: disk 'lvmid/vdgMZq-fOiz-tssQ-83iX-bdMX-EUuZ-USGkPfzajfm9e-14Cq-CB00e-eg5d- jitY-1U1b-tCMKsf' not found. grub rescue> ls

your system does not seem to be using ZFS on root (the lvmid part indicates that your root filesystem is on a LVM)...

the following wikipage might help:
https://pve.proxmox.com/wiki/Recover_From_Grub_Failure

once you have your root mounted (and proc,sys,dev,....)
run grub-install from inside a chroot

I hope this helps!

 

[cynric10]

your system does not seem to be using ZFS on root (the lvmid part indicates that your root filesystem is on a LVM)...

the following wikipage might help:
https://pve.proxmox.com/wiki/Recover_From_Grub_Failure

once you have your root mounted (and proc,sys,dev,....)
run grub-install from inside a chroot

I hope this helps!

Thanks for your help.

I've tried the steps that are shown in the thread. It worked well after finding out what the right partition was. Mine was sdb2.

After that I did the update-grub

and got this messege:

Warning: os-prober will not be executed to detect other bootable partitions.
Systems on them will not be added to the GRUB boot configuration.
Check GRUB_DISABLE_OS_PROBER documentation entry.

because it is a warning, I just continued with

• grub-install /dev/sdb

ran through without any error and also was showing "no error".
After the reboot I'm now stuck in the GNU Grub as seen in the screenshot. If I type in boot, no kernel can be found.

Any help on this one?

 

[Neobin]

Might be more efficient to concentrate on one thread:
https://forum.proxmox.com/threads/nach-update-komme-in-grub-rescue.115014

 

[cynric10]

Might be more efficient to concentrate on one thread:
https://forum.proxmox.com/threads/nach-update-komme-in-grub-rescue.115014

sure!
the german thread was the first one and I was asked to create a new one beacuse it didn't fit the error I was posting my problem previously.

 

[Stoiko Ivanov]

then I'll close this one - to avoid further confusion
thanks for noticing @Neobin !