proxmox 4 beta 2 doesn't boot anymore

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emanuelebruno

Renowned Member
May 1, 2012
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Catania
emanuelebruno.it
This is the message:

Code: 
error: compression algorithm inherit not supported
.
Entering rescue mode...
grub rescue>

What I have to do? I just tryed to change the boot order without success (I have 2 hard drive in Raid 1 ZFS)
 
I had exactly the same problem and I had no success solving it.
It happened with proxmox 4.1 when I applied latest patches.
My Server is proliant ml10 v2. I have two of them working as a cluster, and the problems only ocurred in one of both.
What is even more strange, is that I moved disks to another computer, and they boot correctly..

Things I have done:

I boot with a systemrescuecd that supports ZFS ( http://ftp.osuosl.org/pub/funtoo/distfiles/sysresccd/ ) and imported rpool. I had to change the rpool/ROOT/pve-1 mountpoint in order to access to files. All ZFS are working without errors. I tried:
* Reinstalled grub with no success ( https://forum.proxmox.com/threads/grub2-recovery-on-zfs-proxmox-ve-3-4.21306)
* I dissabled compression for all zfs datasets (no success)

After battleling a lot of time, I gave up and reinstalled a new system in two new disk zfs raid1.
I folowed the instructions from https://pve.proxmox.com/wiki/Proxmox_VE_4.x_Cluster (Reinstalling a cluster node)

I booted with the systemrescuecd in order to make the backup of the cluster files.

As it was running on ceph storage, I also had to backup and restore the ceph dir to the new machine (/var/lib/ceph and /etc/ceph)

Now my server is running again, but I do not understand why it did not boot in my server after the update, and why it boots in another computer..

P.D. I don't know if there is an official guide to boot a zfs proxmox damaged system, but maybe people from proxmox could write one. I have spent a lot of time trying to boot the system offline, and I found a special version of system rescuecd with zfs support.
 
To save people time in case they hit this thread in searches for grub rescue> + zfs problems like me, Ubuntu 16.04 desktop has a live boot ('try ubuntu') that will do zfs, provided you can get the machine online to apt-get update && apt-get install zfsutils-linux.
 
mathx said:
To save people time in case they hit this thread in searches for grub rescue> + zfs problems like me, Ubuntu 16.04 desktop has a live boot ('try ubuntu') that will do zfs, provided you can get the machine online to apt-get update && apt-get install zfsutils-linux.
Click to expand...
pve-installer has also an rescue-boot to boot into an zfs-installed pve.

Udo
 
My 3.4 iso i had on the remote KVM didnt seem to have a rescue option but 5.1 does, but for some reason on this particular server it just hangs on a black screen and never boots (Supermicro X7DB8), so had to resort to an ubuntu live which did work.
 
mathx said:
My 3.4 iso i had on the remote KVM didnt seem to have a rescue option but 5.1 does, but for some reason on this particular server it just hangs on a black screen and never boots (Supermicro X7DB8), so had to resort to an ubuntu live which did work.
Click to expand...
Yes, pve3.4 is a little bit too old for that, but with an pve4.x you have an rescue-mode (I would not use pve5.x for such an old system, because of updates in the zfs-versions).

Udo
 
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