Data migration from 7-mode to C-mode Netapp
Data migration from 7-mode to C-mode Netapp
This is the quick and dirty way for moving a few volumes from NetApp 7-Mode to a Cluster Mode SVM, if you need to migrate a large environment it might be worth engaging professional services and/or using the 7-Mode Transition Tool. In our case we performed hyper-visor storage migration for the VMs, the only thing left was several CIFS shares. For this process to work one needs snapmirror licenses and please note the transition is one way only, from 7-Mode to C-Mode.
After all the prerequisites are in place, we need to create a NetApp Peer Transition. On the cluster CLI execute
Cluster::> vserver peer transition create -local-vserver C_MODE-System -src-filer-name 7_Mode_filer_name Transition peering created
Create a destination volume on C-mode, note the type –DP. This is a special volume type for the transition.
Cluster::>volume create –vserver SVM_name -volume volume_name -aggregate aggr_name -size 250GB -type DP [Job 1801] Job succeeded: Successful
Replace SVM_name, volume_name, aggr_name and xx as needed
Create an Inter-cluster LIF (this can be done from Server Manager GUI also)
Cluster::>network interface create -vserver CMODE_system -lif node-01-repl -role intercluster -home-node 7MODE_system -home-port a0i -address xxx.xxx.xxx.xxx -netmask xxx.xxx.xxx.xxx
Replace node-01-repl with whatever name make sense for you, assign an interface and fill in the IP and netmask for the network that will be used for replication.
If the C-mode replication LIF and 7-mode IP are on different subnets one need to configure routing.
For 8.3.x use the following command to configure routing
Cluster::>network route create -vserver node-01 -destination xxx.xxx.xxx.xxx/xx -gateway xxx.xxx.xxx.xxx
For 8.2.x use
Cluster::>network routing-groups route create -vserver node-01 -routing-group ixxx.xxx.xxx.xxx/xx -destination xxx.xxx.xxx.xxx/xx – gateway xxx.xxx.xxx.xxx
Use the network ping command to verify that you can use the intercluster LIF to ping the 7-Mode system from C-mode.
Cluster::>network ping -lif node-01-repl -lif-owner node-01 -destination 7MODE_system
You should receive 7mode_system is alive
Create a Netapp Snapmirror Relationship using TDP (Transition Relationship)
Cluster::>snapmirror create -source-path 7MODE_system:volume_to_move -destination-path CMODE_System:volume_destination -type TDP
Pay attention, all the commands are case sensitive, use the same hostname or IP you used on the first step when the peer transition was created!
This should return the relationship we just created.
Cluster::> snapmirror initialize -destination-path CMODE_SVM:destination_volume
Tip if you keep a SSH session open to the 7-mode controller, if there are any settings that prevents the snapmirror from initialize, will be listed on the console.
To see the Snapmirror status
Or we can also filter the output
Cluster::>snapmirror show -destination-path CMODE_SVM:target_volume
Replace CMODE_SVM:target_volume with your specific values
Start incremental replications for the volume we just initialized
Cluster::>snapmirror update -destination-path CMODE_SVM:target_volume
Break the mirror
Cluster::>snapmirror break -destination-path CMODE_SVM:target_volume
Delete the mirror
Cluster::>snapmirror delete -destination-path CMODE_SVM:target_volume
Create the mount point
Cluster::> vol mount -vserver CMODE_SVM -volume volume -junction-path /volume
In my case I had to use the CLI since the volumes were not visible in the GUI to be mounted, I suspect the 7 to C mode replication for this.
Create the CIFS share and assign share permissions (Remove everyone)
I used the GUI for this.
Disable fixed volume size, this was configured automatically because of the snapmirror replication.
Cluster:> vol modify -vserver CMODE_SVM -volume volume -filesys-size-fixed false
Delete the peer transition
Cluster:> vserver peer transition delete -local-vserver CMODE_SVM -src-filer-name 7-Mode_System
Transition peering deleted
The above procedure worked for transitioning a CIFS share from Ontap 8.2.2 running in 7-mode to 8.3 storage on Cluster Mode.
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