Which option would be least appropriate if the goal is to preserve data during the upgrade?

Which option would be least appropriate if the goal is to preserve data during the upgrade?

• A. Move the volumes from the old nodes to the new nodes.
• B. Delete all existing volumes on the old cluster.
• C. Back up data before upgrade and restore after.
• D. Reformat and recreate all volumes on the new cluster.

Answer: (D)

The key idea is to avoid any action that destroys data or breaks the ability to recover it during an upgrade. Reformatting and recreating all volumes on the new cluster would erase every existing volume's contents, wiping out data and demanding a restore from backups or another recovery process. That makes it the least appropriate approach for preserving data through the upgrade. In contrast, moving volumes to the new nodes preserves the actual data, and backing up before upgrading plus restoring after provides a proven recovery path if anything goes wrong. Deleting all existing volumes would also remove data, which is obviously unsuitable for data preservation. So, reformatting and recreating volumes is the option that fails to preserve data during the upgrade.

The key idea is to avoid any action that destroys data or breaks the ability to recover it during an upgrade. Reformatting and recreating all volumes on the new cluster would erase every existing volume's contents, wiping out data and demanding a restore from backups or another recovery process. That makes it the least appropriate approach for preserving data through the upgrade. In contrast, moving volumes to the new nodes preserves the actual data, and backing up before upgrading plus restoring after provides a proven recovery path if anything goes wrong. Deleting all existing volumes would also remove data, which is obviously unsuitable for data preservation. So, reformatting and recreating volumes is the option that fails to preserve data during the upgrade.