sda2 size changed on recent versions of SSB (4378905)

sda2 size (2GB) has caused some unpredicted issues in the past, hence we have increased the size (4GB) in recent versions.

sda2 size was not enough for bigger and faster environments, hence an increase was needed.

The sda2 changed to 4G on recent versions (7.0.1 LTS and above , 7.3.0 FR and above), therefore, in a case of an HA setup, reinstalled nodes with those versions have the new size, while upgraded nodes have the old size, thus an HA join will not work if the sda2 is different in size between the two nodes!

There are two workarounds to handle this:

1. PREFERRED WAY: Install the desired version (7.0.1 LTS and above , 7.3.0 FR and above) on the secondary node. Then use the Data transfer feature to migrate the old node to the newly installed node. This will create a standalone node with the new 4GB sda2 disk size and also shut down the old slave node. If the migration is a success (the new node processing data as intended) the old node can be reinstalled with  the desired version (7.0.1 LTS and above , 7.3.0 FR and above) as well and join in to HA, therefore the HA state is restored as well.
2. Install an older version and upgrade it to the same version as the existing 'standalone' node, and join it to the HA. If the older version still has the 2GB size, it might cause issues later.