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July 25, 2026

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My Article is here: (written more than a decade back)

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How does NFS access works for version nfsv3 & nfsv4 in ONTAP

When a mount command is issued to an ONTAP NFSv3 server from an NFS client, the following occurs: 1. RPC is made to port 111 (portmapper) of the NFS server to attempt a TCP connection through the portmapper. 2. When the RPC call has been acknowledged, portmapper issues a GETPORT call to port 111 of the NFS server data LIF to obtain which port NFS is allowed on. 3. The NFS server returns the port 2049 (nfs) to the client. 4. The client then closes the connection to port 111. 5. A new RPC call is made to port 2049 of the NFS server data LIF. 6. The NFS server returns the call successfully and the client sends an NFS NULL call to port 2049 of the NFS server’s data LIF. This action checks whether the parent volume allows access to the mount. In this case, the parent volume is mounted to /, or the SVM root. 7. The NFS NULL call is returned successfully and the client proceeds with the mount attempt. 8. Portmapper sends a GETPORT call to the NFS server’s data LIF asking for the mou...

How to edit configuration files using "wrfile" command in NetApp DataONTAP.

DataONTAP does not include an editor such as 'vi' in most standard UNIX like distributions. In DataONTAP, to edit any file from the console you need to use "wrfile" command, but this command can either overwrite or with -a option can append to a file. Hence, in order to edit/modify the file you need a workaround. However, if you have setup CIFS/NFS then you can easily edit any files using your favorite editor such as word. Following example shows steps to edit the file from the DataONTAP console. 1. Open telnet/rsh Or ssh to the filer console (with putty for example) 2. Type Filer>rdfile /etc/rc (For example) Or whatever file you want to edit. It will print out the current contents of the file. Note: To be on the safer side, make a copy of the file before editing the current one. (Use CIFS/NFS or ndmpcopy to to create a backup) 3. Copy the content of the rdfile output to a Notepad or other text editor. To do that: Click the the telnet/putty's top left side cor...

How to collect NetApp cluster ontap logs

Following instructions applies to both Cluster Ontap 8.x, and ONTAP 9.x. Collecting logs in Cluster Ontap is made very easy with GUI access. 1. Identify Cluster management LIF IP of your cluster. If you don't know you can simply run this command. cluster_ontap_9::> network interface show cluster_ontap_9 cluster_mgmt up/up 192.168.0.240/24 cluster_ontap_9-02 e0d false In this case, clust_Mgmt LIF = 192.168.0.240 2. Open any browser window and type ...

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