How to export rpool on a running system

[Jarvar]

I have been trying to solve an issue when trying to backup a VM, would get an error.
I tried restart the node, now that the VM is not running it can't find the original attached disk.
it shows
Download TASK ERROR: timeout: no zvol device link for 'vm-201-disk-0' found after 300 sec found.

It was suggested to review this thread https://forum.proxmox.com/threads/t...-700-disk-0-found-after-300-sec-found.106242/
One suggestion that resolved their issue was exporting the zfs pool.
The pool for me which is on local-zfs is on the rpool.
When I try to zpool export rpool and zpool export -f rpool
I get busy signals only.
Please help.
Thank you.

 

[leesteken]

I'm convinced that it's not possible to export (as in unmount) the root filesystem while Linux is running. Maybe you can rescue boot via the Proxmox installer, import -f rpool and then export rpool?

 

[LnxBil]

I'm convinced that it's not possible to export (as in unmount) the root filesystem while Linux is running.

I haven't tried it with ZFS yet, but I had recently switched the running OS to copy in RAM to reinstall the disk I booted with and it worked. I also wasn't aware that it works, but it does!

 

[Jarvar]

I solved the issue but probably not in The best way. I restored the VM from a back instead. Hopefully I don’t run into that issue again.

 

[Jarvar]

I haven't tried it with ZFS yet, but I had recently switched the running OS to copy in RAM to reinstall the disk I booted with and it worked. I also wasn't aware that it works, but it does!

Also this supports a good reason to keep boot on a different drive than VMs. Unless you create more pools on the same drive but could be a bit confusing. I might try it out on a larger drive single system in order to store other VMs and backups.

 

[LnxBil]

larger drive single system in order to store other VMs and backups.

I wouldn't storage VM and their backups on the same single drive. Looks like an accient to happen.