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Basic's of storage networks (An insight into - How we got to, where we are today..')

January 14, 2009

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Basic's of storage networks (An insight into - How we got to where we are today..')

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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...

Configuring Multipath for redhat (centos7-3.10.0-862.el7.x86_64) in simple straight forward steps for ISCSI LUN on ONTAP 9

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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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