Comment 6 for bug 1793543

Reviewed: https://review.openstack.org/604766
Committed: https://git.openstack.org/cgit/openstack/stx-metal/commit/?id=bea3956ee912abaa2950dc8b3de58092fba0fea1
Submitter: Zuul
Branch: master

commit bea3956ee912abaa2950dc8b3de58092fba0fea1
Author: Stefan Dinescu <email address hidden>
Date: Mon Sep 24 15:21:34 2018 +0300

    Change backup partition size for small disks

    Minimum backup partition size is calculated as the sum between the
    sizes of the glance and database partitions, as well as a 20GB
    overhead.

    This fix increase the default backup size partition to 40GB to
    be in line with the above calculations, considering the database
    and the glance partitions are 10GB each by default.

    This also increases the minimum disk requirements from 120GB
    to 130GB.

    Change-Id: I5cfc329870a84a6245d868b4c4990829e702e886
    Closes-bug: 1793543
    Signed-off-by: Stefan Dinescu <email address hidden>