Recent Posts

December, 2015

  • 5 December

    NetApp – Clustered DATA ONTAP – Storage Failover – SFO – Part 10

    Unplanned SFO Netapp

    In NetApp Storage system, RAID feature will provide the fault tolerance in-case of any  disk failures. But what will happen if the controller(node) itself  fails ? NetApp ships the controllers as HA pairs (Two controllers in one chassis ). If one node fails , automatically other controller will take over the storage.  Enabling storage failover (SFO) is done within pairs, regardless of …

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  • 4 December

    NetApp – Clustered DATA ONTAP – Storage Aggregate – Part 9

    NetApp RAID-DP

    Storage systems should provide the fault tolerance if any  disk failures occurs in disk-shelf’s. NetApp uses the RAID-DP technology to provide the fault tolerance. A RAID group includes several disks that are linked together in a storage system. Although there are different implementations of RAID, Data ONTAP supports only RAID 4 and RAID-DP. Data ONTAP classifies disks as one of four types for RAID: data, hot spare, parity, …

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November, 2015

  • 30 November

    NetApp – Clustered DATA ONTAP – Shells & Directories – Part 8

    netapp shell

    The one of the most famous proverb about the Unix systems is – “Where there is a shell there’s a way” .  If you want to directly interact with system kernel, you need a shell. NetApp Clustered Data ONTAP uses the Free BSD operating system on the controllers. You can manage the resources from cluster shell (CLI) or OnCommand GUI …

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  • 29 November

    NetApp – Clustered DATA ONTAP – License Management – Part 7

    In NetApp Data ONTAP , you must buy license keys to enable the additional features.  NetApp Data ONTAP 8.2 onwards ,all the licesne keys are 28 characters in length.  In Clustered Data ONTAP , you must keep the license entitlement same across the all the nodes. This will ensure that fail-over will happen without any issues. In this article we are going to …

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  • 28 November

    NetApp – Configuring the Two Node Cluster – Part 6

    NetApp 6 Node cluster

    This article will demonstrates that how to configure the NetApp (Clustered ONTAP) two node cluster. Since I am going to use the simulator for this demonstration, we can’t virtualize the HA pair controllers. I will use two separate nodes to form the cluster with switch-less configuration(Assuming that direct cluster inter-connect cabling is done between nodes). In an order to form …

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  • 27 November

    NetApp – Clustered DATA ONTAP – Write Operations – Part 5

    NetApp - Write Operations - Direct Access

    This article is going to explain about the Netapp write operations. In Clustered Data ONTAP , write request might land on any of the cluster node irrespective of the storage owners. So that data write operations will be either direct access or indirect access. The Write requests will not send to the disks immediately until CP ( consistency point) occurs . NVRAM …

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  • 27 November

    NetApp – Clustered DATA ONTAP – Read Operations – Part 4

    Indirect Data Access - read Operations

    There is a huge difference between DATA ONTAP 7 Mode and C-Mode on  data access methods.  In 7-Mode, we will be having HA pair controllers to access the data. When the request comes , it will go to any one of the HA controllers.  But in C-Mode , Multiple controllers will be aggregated in the cluster and the request might land on …

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  • 23 November

    NetApp – Clustered DATA ONTAP – FAS Series – Part -3

    Single Chassis HA-Pair

    NetApp FAS unified storage arrays available in wide range of configurations to meet the current business needs. Clustered Data ONTAP operating system is available for all the FAS unified storage arrays. Each of the Netapp FAS platforms can be configured with SATA, SAS, or SSD disk shelves, and shelves can be mixed. This allows you to scale performance and capacity independently. Using NetApp FlexArray …

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