The vsan.ondisk_upgrade command provides various command options that you can use to control and manage the Virtual SAN cluster upgrade. For example, you can downgrade disk formats and eliminate objects version upgrade.

Run the vsan.ondisk_upgrade --help command to display the list of RVC command options.

Use these command options with the vsan.ondisk_upgrade command.

Table 1. Upgrade Command Options

Options

Description

--hosts_and_clusters

Use to specify paths to all host systems in the cluster or cluster's compute resources.

--ignore-objects, -i

Use to skip Virtual SAN object upgrade. You can also use this command option to eliminate the object version upgrade. When you use this command option, objects continue to use the current on-disk format version.

--downgrade-format, -d:

Use to downgrade disk format and file system. Use only if there is no version 2.0 or 3.0 object in the Virtual SAN cluster. This option also disables the Virtual SAN file system version 2.0 or 3.0 on the selected hosts and restricts creating disk groups based on that version.

--allow-reduced-redundancy, -a

Use to remove the requirement of having a free space equal to one disk group during disk upgrade. With this option, virtual machines operate in a reduced redundancy mode during upgrade, which means certain virtual machines might be unable to tolerate failures temporarily and that inability might cause data loss. Virtual SAN restores full compliance and redundancy after the upgrade is completed.

--force, -f

Use to enable force-proceed and automatically answer all confirmation questions.

--help, -h

Use to display the help options.

For information about using the RVC commands, see the RVC Command Reference Guide.