[Solved] HELP needed with USB drive

[Kornelius777]

Dear all,

I've set up my Raspberry Pi with the Operating System on a (USB-) SSD

Also (on a (2nd) partition), all guest disks are located.

Now, something stupid:

One of those guests is my home automation system, and I have several USB sensors connected to the Raspberry.
I wanted to hand through the sensors - and got the USB SSD!

Which file will I need to edit to get this mistake out of the system?

Thank you all kindly!

 

[Dunuin]

Probably the config file of your LXC in /etc/pve/lxc/YourVMID.conf

 

[Kornelius777]

/etc/pve exists and is empty......

 

[Kornelius777]

It's a Virtual Machine.
Does that make any difference?

 

[Dunuin]

Yes, its the mountpoint for the PMXCFS filesystem thats mount the configs stored in in SQLite DB there. So if your pve-cluster service isn't running, that folder is empty, as the PMXCFS isn't working.

 

[Dunuin]

I thought Raspis couldn`t run VMs. If its a VM then its stored in the VMs config file in /etc/pve/qemu-server/YourVMID.conf

 

[Kornelius777]

And that's the point where the cat bites its own tail.
The SSD is handed over to the guest :-(

 

[Kornelius777]

I do have snapshots of the guests, though - on the 2nd partition.
Is there a way to delete this SQLite database?
Just shred it and start from zero?
How would I accomplish that?

 

[Dunuin]

I do have snapshots of the guests, though - on the 2nd partition.
Is there a way to delete this SQLite database?

https://pve.proxmox.com/wiki/Proxmox_Cluster_File_System_(pmxcfs)#_recovery

 

[Kornelius777]

Thank you very much!

 

[Dunuin]

Maybe you could add something like this to /etc/fstab:

@reboot root mv /etc/pve/qemu-server/VmidOfYourHaVm.conf /etc/pve/qemu-server/VmidOfYourHaVm.conf.backup

With luck its fast enough and will rename the config file at reboot, before that home assistant VM is started passing through the USB SSD.

 

[Kornelius777]

Actually, I was lucky enough to get a ssh connection to the host before the guests started.
And with your answers, you pointed me into the right direction.
I found the host config and could revert this ... well... stupidity.

Thank you again!

 

[Dunuin]

Yes, when working with passthrough you should always disable autostart of the guest when testing new configs or removing/adding hardware. So that you don't run into this problem in the first place.