Hi list, I had to relocate my third node in a classic DRBD 8.4 three node set up to a new host.  I am having difficulty making the stacked resource the primary.  I am following this guide: https://www.linbit.com/drbd-user-guide/users-guide-drbd-8-4/#s-three-nodes Specifically this:

5.18.3. Enabling stacked resources

To enable a stacked resource, you first enable its lower-level resource and promote it:

drbdadm up r0 drbdadm primary r0

As with unstacked resources, you must create DRBD meta data on the stacked resources. This is done using the following command:

# drbdadm create-md --stacked r0-U

Then, you may enable the stacked resource:

# drbdadm up --stacked r0-U # drbdadm primary --stacked r0-U

After this, you may bring up the resource on the backup node, enabling three-node replication:

# drbdadm create-md r0-U # drbdadm up r0-U

It seems all is good right up to the last command: :~# drbdadm primary informer :~# drbdadm create-md --stacked informer-U You want me to create a v08 style flexible-size internal meta data block. There appears to be a v08 flexible-size internal meta data block already in place on /dev/drbd11 at byte offset 429483581440 Do you really want to overwrite the existing meta-data? [need to type 'yes' to confirm] yes md_offset 429483581440 al_offset 429483548672 bm_offset 429470441472 Found some data  ==> This might destroy existing data! <== Do you want to proceed? [need to type 'yes' to confirm] yes initializing activity log NOT initializing bitmap Writing meta data... New drbd meta data block successfully created. :~# drbdadm up --stacked informer-U :~# drbdadm primary --stacked informer-U 110: State change failed: (-2) Need access to UpToDate data Command 'drbdsetup-84 primary 110' terminated with exit code 17 drbd11 is the device for the lower level resource 'informer', drbd110 the device for stacked resource 'informer-U'.  Replication between hosts 'Alice' and 'Bob' (not the real host names but corresponding to the names used int the documentation) is functional.  I am performing the above commands on 'bob'. I do not understand why it is complaining it needs UpToDate data in that last command if 'informer-U' is 'stacked-on-top-of informer' and was just created. the .res file(s) look like this:

resource informer {         net {                 protocol C;         }

        device    /dev/drbd11;         meta-disk internal;

        on trk-kvm-01 {                 address 10.10.1.125:7789;                 disk      /dev/trk-kvm-01-vg/informer;              }              on trk-kvm-02 {                 address 10.10.1.126:7789;                 disk      /dev/trk-kvm-02-vg/informer;         } }

resource informer-U {         net {                 protocol A;         }

        stacked-on-top-of informer {                 device /dev/drbd110;                 address 10.10.2.126:7789;         }

        on trk-bkp-01 {                 device  /dev/drbd110;                 disk    /dev/ubuntu-vg/informer;                 address 10.10.2.127:7789;                 meta-disk internal;         } } Any suggestions on what I am missing in this picture?

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