Which two actions should be taken before an upgrade is started on a Cisco MDS switch? (Choose two.)

The `show install all impact` command is crucial before an upgrade to identify any potential disruptions, compatibility issues, or specific requirements, ensuring a smoother process and minimizing unexpected downtime.

Disabling Cisco Fabric Services (CFS) is not a standard pre-upgrade action and is generally not recommended as CFS is essential for many integrated features to operate correctly.

Backing up the configuration is a fundamental preparatory step for any system upgrade, providing a recovery point to restore the device's previous state in case the upgrade fails or introduces unforeseen issues.

While sufficient free space is required for an upgrade, checking a specific USB3 device and deleting old image files is not a universally applicable or primary step; bootflash storage is typically the relevant concern.

Making the primary supervisor the active supervisor is not a universal pre-upgrade requirement; upgrades are typically initiated on the currently active supervisor, regardless of its 'primary' status.