What is Clustered ONTAP?

In this post I will try to explain what Clustered ONTAP is, and how it works. First the basics. There are several parts that make a Clustered ONTAP system. It all starts with a cluster.The cluster operates as a single entity, but it has the underlying concept of individualized components. A cluster can be build with several HA pairs of nodes (max. 8 nodes with SAN, 24 nodes with NAS).  All the nodes deliver physical resources to the cluster that can be used for functionality. Functionality will be given by Storage Virtual Machines (SVM’ s) Servers and clients connect to Logical InterFaces (LIF’ s) that are used by a SVM.Read More

How to remove ownership on foreign disks in clustered Data ONTAP

Perform the following steps: Find the disks that show the old owner: ::> system node run -node <node name> -command “disk show -a” For each disk with the old owner, run: ::> system node run -node <node name> -command “disk assign <disk> -s unowned -f” Once they are unowned, depending on if the auto assign flag is set, they will either immediately be assigned to the node, or they will be ready to be assigned as normal. Note: If they had aggregates on them, the foreign aggregate removal procedures will need to be followed. For more information, see article 1013046: How to remove or access a foreign aggregate (an aggregateRead More

Remove a foreign aggregate

Instructions for clustered Data ONTAP 8.3 and later versions The following are the steps to remove a foreign aggregate and make the disks available as unzeroed spares in clustered Data ONTAP 8.3 and later versions. Run the following command to identify the node with the aggregate flagged as foreign. The relevant aggregate will have the label foreign. ::> system node run -node * -command sysconfig -r Based on the above output, run the following clustershell commands, referencing the node that has the foreign aggregate. ::> set -privilege advanced ::*> storage aggregate remove-stale-record -nodename [node_name] -aggregate [foreign aggregate name] This will remove all foreign aggregates from the relevant system and free upRead More

MetroCluster setup using one data aggregate per cluster

This procedure applies to Data ONTAP 8.3/8.3.0 only. To use this feature in Data ONTAP 8.3.1 and later version please refer to the documentation of the appropriate release. These versions allow the configuration of MetroCluster with a single mirrored data aggregate per cluster. Note: To get support for this feature in Data ONTAP 8.3/8.3.0 please contact your account team and acquire a Product Variation Request (PVR). The MetroCluster configuration requires at least two mirrored data aggregates to be created in each cluster being configured. These aggregates are used to create metadata volumes (one metadata volume per aggregate), when the metrocluster configure command is run. If the administrator desires to configureRead More