[pve-devel] Default cache mode for VM hard drives

[Dietmar Maurer]

> Yes, so DRBD gets the data, and kvm send sync request when required. So I still
> not
> see the problem.
> Can you also reproduce the problems if you use DRBD device directly, without
> LVM on top?
> 
> Yes, it is reproducible without LVM.

OK. So is there some 'official' Documentation from DRBD people, stating that we
need to use 'cache=writethrough' with qemu?