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[SOLVED] KVM on CephFS - Not possible?

I am trying to install a VM on CephFS shared storage. No matter which format(qcow2,vmdk,raw) i try, i keep getting this error message when i try to power on:
Code:

  kvm: -drive file=/mnt/pve/fs-ceph-01/symmcom/images/100/vm-100-disk-1.raw,if=none,id=drive-ide0,format=raw,aio=native,cache=none: could not open disk image /mnt/pve/fs-ceph-01/symmcom/images/100/vm-100-disk-1.raw: Invalid argument
CephFS is setup properly because i have installed Containers on the same storage and they are working fine. Its the KVM that cannot be started.
I knew CephFS is still not matured enough. Just wanted to see what performance i get with a VM on it.

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