CNV-41959: Fix crash no rootDisk

[metalice]

📝 Description

Fix crush when disk root is missing.

🎥 Demo

No crash screen

[openshift-ci-robot]

@metalice: This pull request references CNV-41959 which is a valid jira issue.

Warning: The referenced jira issue has an invalid target version for the target branch this PR targets: expected the bug to target the "4.17.0" version, but no target version was set.

In response to this:

📝 Description

Fix crush when disk root is missing.

🎥 Demo

No crash screen

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the openshift-eng/jira-lifecycle-plugin repository.

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: metalice, upalatucci

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [metalice,upalatucci]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[gouyang]

/cherry-pick release-4.16

[openshift-cherrypick-robot]

@gouyang: new pull request created: #2014

In response to this:

/cherry-pick release-4.16

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.