6.7. Downgrading DRBD 8.4 to 8.3

If you’re currently running DRBD 8.4 and would like to revert to 8.3 there are several steps you will have to follow. This section assumes you still have the 8.4 kernel module and 8.4 utilities installed.

Stop any services accessing the DRBD resources, unmount, and demote the devices to Secondary. Then perform the following commands.

[Note]Note

These steps will have to be completed on both servers.

drbdadm down all
drbdadm apply-al all
rmmod drbd

If you’re using the LINBIT repositories you can remove the packages using apt-get remove drbd8-utils drbd8-module-`uname -r` or yum remove drbd kmod-drbd

Now that 8.4 is removed reinstall 8.3. You can do this either by changing your repositories back to the 8.3 repos, or by following the steps located in the 8.3 User’s Guide

[Warning]Warning

If you migrated your configs to the 8.4 format be sure to revert them back to the 8.3 format. See Section A.2, “Changes to the configuration syntax” for the options you need to revert.

Once 8.3 is re-installed you can start your DRBD resources either manually using drbdadm or /etc/init.d/drbd start.