On Thu, 2009-08-20 at 09:38 -0600, Alan Sparks wrote: > Ross Walker wrote: > > On Aug 20, 2009, at 10:22 AM, Coert Waagmeester <lgroups at waagmeester.co.za > > > wrote: > > > >> Hello all, > >> > >> > >> I am running drbd protocol A to a secondary machine to have > >> 'backups' of > >> my xen domUs. > >> > >> Is it necessary to change the xen domains configs to use /dev/drbd* > >> instead of the LVM volume that drbd mirrors, and which the xen domU > >> runs > >> of? > >> > > > > Yes otherwise the data won't be replicated and your drbd volume will > > be inconsistent and need resync'd. > > > > -Ross > > > > _______________________________________________ > > > > To be clear, are you saying you have a DRBD partition on both host > machines, and LVM on top of that to allocate LVs for host storage? > > You would not want to bypass the LVM layer in that case. The hosts > would be still configured to map the LV devices into the domUs. You > need to go through the LVM layer, which uses the DRBD partition as a > block physical device. The writes down through the DRDB layer will > still be replicated. > -Alan > Hello Alan, This is my current setup: Xen DomU ============ DRBD ============ LVM Volume ============ RAID 1 What I first wanted to do was: DomU | DRBD ============ LVM Volume ============ RAID 1 Is this possible or not recommended? Regards, Coert