HELP!!! grub problem after upgrade to 8.1

keropiko

Active Member
Sep 16, 2019
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Hell all,

i have a 5 years proxmox server installed from the early versions of 5.x. with zfs. Until today, with all the updates ecc.. i had version 8 and everything worked perfectly.
Yesterday , i upgraded to the latest version and after the reboot i get "GRUB RESCUE - UNKNOWN FILESYSTEM".

I have read all the guides here how to recovery, but since my proxmox is from an older version, i don't have the 512 partitions so i can't resolve.

Mounting the live usb, i can mount on /mnt the rpool, and see the files but don't know how to fix the grub error and boot.

Please help me, because i don't know what to do and this is my job server.

If i have to reinstall , is there a way to save all the data or make a backup since zfs makes "part". I have backups but even 2 days backup i don't have is crucial.

Is there a way to repartition the main rpool drive and create a 512mb partition there?

I found online a zfs option called "compatibility" i have set is to the rpool on "grub2" but no result.

I am going crazy...

Please help me!

Thank you.
 
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