Volume Rehost In Cluster Mode NetApp

How To Re-host Volume From One SVM To Another SVM Cluster Mode NetApp

In this Blog we will see what is Volume Rehost and how we can move or rehost volume from one vserver to another vserver in NetApp Cluster Mode. In later section we will also move a CIFS volume from one SVM to another SVM  via command line.

 

What is Volume Rehost in NetApp Cluster Mode

Volume rehost enables you to reassign NAS or SAN volumes from one storage virtual machine (SVM, formerly known as Vserver) to another SVM without requiring a SnapMirror copy.

Volume rehost is a disruptive operation for data access. Hence you should get a downtime from share owner and then plan it within that downtime window.

Volume Eligible For Rehost In NetApp Cluster Mode

The volume rehost procedures depend upon the protocol type and the volume type. Based on these the steps to perform volume rehost differs. Below is the brief summary for volume rehost for different scenario.

Rehosting CIFS volumes

You can rehost volumes that has CIFS shares. After rehosting the CIFS volume you must mount the volume and create a CIFS share in destination SVM. Volume rehost moves NTFS ACL so no need to worry about permission mismatch. To know how to create cifs share click the Link

Rehosting NFS volumes

You can rehost volumes that serve data over NFS protocol. After rehosting the NFS volumes, you must mount the volume create export policy and permission rules in destination SVM. Click the Link for more details on creating export-policy and rules.

Rehosting SAN volumes

You can rehost volumes that have mapped LUNs. After re-creating the initiator group (igroup) in the destination SVM, volume rehost can automatically remap the volume on the same SVM.

Rehosting volumes in a SnapMirror relationship

You can rehost volumes in a SnapMirror relationship. Before rehosting you should delete the snap-mirror relationship. After volume rehost you must create peer relationship between source and destiantion SVM. You should also create new snap-mirror relationship and schedule it for Sync.

Pre Check For Volume Rehost From In NetApp Cluster Mode

Volume must be online. Offline volume cannot be rehosted Volume management operations, such as volume move or LUN move, must not be running. Data access to the volume must be stopped. Destination SVM Configuration must match with Source SVM.

Post Steps Of Volume Rehost In NetApp Cluster Mode

After the rehost operation volume will lost Some configuration such as Antivirus policies, Volume efficiency policy, QOS, Snapshot policies , Quota rules, export policy and rules, User and group IDs. If any of the above feature was there for rehosting volume them you must create these in destination SVM as well.

You also need to mount the volume and the create new share. Good thing is that NTFS permission will be the same as it was in source SVM. Last thing is that you have to use destination SVM IP to access the shares.

Steps And Commands For Volume Rehost In NetApp Cluster Mode

1. Record information about the CIFS shares to avoid losing information on CIFS shares in case volume rehost operation fails.
2. Unmount the volume In Source SVM:volume unmount -vserver vs1 -volume vol1
3. Switch to the advanced privilege level:set -privilege advanced
4. Rehost the volume on the destination SVM:volume rehost -vserver vs1 -volume vol1 -destination-vserver vs2
5. Mount the volume under the appropriate junction path in the destination SVM:volume mount -vserver vs1 -volume vol1 -junction-path /vol1
6. Create CIFS shares for the rehosted volume:vserver cifs share create -share-name share1 -vserver vs1 -path /vol1
7. Point the DNS Host entry to IP of New SVM.

Checkout the YouTube Video on Volume Rehost In Cluster Mode NetApp. This videos has live demo for volume rehost. Subscribe to Channel for more such videos.