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Verifying that the cluster is ready

Before you perform the upgrade or downgrade, you should verify that your cluster configuration is healthy.

  • Verifying LDAP status
    Beginning in ONTAP 9.5, if LDAP is used by your storage virtual machines (SVMs), you must have an established LDAP connection to perform a nondisruptive upgrade. You should verify the LDAP connection before you begin the upgrade.
  • Verifying DNS server status
    Beginning in ONTAP 9.5 and later, you should verify the status of your Domain Name Service (DNS) server before and after performing a nondisruptive upgrade,.
  • Verifying HA status
    Before performing a nondisruptive upgrade, you should verify that storage failover is enabled for each HA pair. If the cluster consists of only two nodes, you should also verify that cluster HA is enabled.
  • Verifying cluster health
    Before and after you upgrade, revert, or downgrade a cluster, you should verify that the nodes are healthy and eligible to participate in the cluster, and that the cluster is in quorum.
  • Verifying storage health (verifying that the cluster is ready)
    Before and after you upgrade, revert, or downgrade a cluster, you should verify the status of your disks, aggregates, and volumes.
  • Verifying networking and storage status for MetroCluster configurations
    Before and after performing an update in a MetroCluster configuration, you should verify the status of the LIFs, aggregates, and volumes for each cluster.
  • Verifying that deduplicated volumes and aggregates contain sufficient free space
    Before upgrading ONTAP, you must verify that any deduplicated volumes and the aggregates that contain them have sufficient free space for the deduplication metadata. If there is insufficient free space, deduplication will be disabled when the ONTAP upgrade is completed.
  • Verifying the LIF failover configuration
    Before you perform an upgrade, you must verify that the failover policies and failover groups are configured correctly.
  • Ensuring that no jobs are running
    Before updating or downgrading the ONTAP software, you must verify the status of cluster jobs. If any aggregate, volume, NDMP (dump or restore), or Snapshot jobs (such as create, delete, move, modify, replicate, and mount jobs) are running or queued, you must allow the jobs to finish successfully or stop the queued entries.
  • Verifying the SAN configuration
    Upgrading in a SAN environment changes which paths are direct. Therefore, before performing an upgrade, you should verify that each host is configured with the correct number of direct and indirect paths, and that each host is connected to the correct LIFs.