NFS and Snapshots corrupt my VMs disks

[Bart Brouwer]

iam using a NFS share from my synology (2 proxmox servers, 1 switch and synology NAS). Everything works fine, except snapshots. When i make a snapshot, the disks (vda1, etc into the vm) are corrupted and my vm doesnt start anymore. sometimes he gives an error like the screenshot , sometimes he gives no error after the snapshot, but the disks are damaged also!

What could i do to make this work?

because above i red about ZFS over ISCSI will not work with synology?

 

[Bart Brouwer]

my synology nfs settings

 

[David Wilson]

Hi Bart.

I wonder if this is perhaps similar to the issue you've experienced?
https://forum.proxmox.com/threads/corrupt-filesystem-after-snapshot.32232/

 

[Bart Brouwer]

Hi Bart.

I wonder if this is perhaps similar to the issue you've experienced?
https://forum.proxmox.com/threads/corrupt-filesystem-after-snapshot.32232/

hi! tnx for your reaction.
my vm is booting, but corrupted. so not a 'vm disk proxmox' problem. the error is into the vm

 

[Bart Brouwer]

I think i found the solution (maybe).
i installed always the vm's with vm virtio HD's (i thought this must be the right one).
But i red somewhere it must be SCSI at the disk option and from OPTIONS tab the VM SCSI CONTROLLER= virtIO SCSI

So i detached the virtual HD, and attached again with scsi. With linux it starts with no problems, with windows i get a blue screen

After testing (10 times made snapshots and reboots, till now no problems).

 

[Bart Brouwer]

hmm after installing new things, my vm stuck again still no solution..

 

[guletz]

Hi, after I see your atached photos, you can see that are many I/O block errors. So if your storage is a remote NFS, then your problems are outside of proxmox(check your network devices, synology).

 

[Bart Brouwer]

tnx for your reaction. But i tested this time with 3 SSD raid 5 configuration into my proxmox server. (without NAS)
So, hoped that was a solution to, but it isnt.

(same topic from someone else)
https://forum.proxmox.com/threads/corrupt-filesystem-after-snapshot.32232/page-2#post-202074

 

[guletz]

Do you use zfs or not with this 3xSSD?

 

[Bart Brouwer]

no. raid 5 with a p440ar raid controller (with cache) and lvm / ext4

 

[Bart Brouwer]

I didnt try without RAM check.
i could try this next week.

 

[guletz]

I didnt try without RAM check.

It has nothing to do with your problem, if your PMX hardware is OK(ram, network, local-storage). Start to check your remote NAS and the network path. I use NFS and containers, and I do snapshots on the NFS. The only difference is the fact that in my setup I use a local NFS share(my nfs is also om the same PMX server), and as local storge I have zfs and not lvm.

 

[Bart Brouwer]

Oke.
But my ssd is local to. So strange

 

[dmulk]

I just ran into this this morning...