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SQL Cluster SAN Migration 1 instance at a time RRS feed

  • Question

  • I have 3 instances on my windows 64 bit sql server 2005 standard edition server. I was given the task of moving the
    SAN Data Drives to each of the instances to a new SAN, and my network admin is going to take care of the Quorum driv

    *****************************************************************************
    I found the below information from one of the posts:

    "OK,  You can do this, it just takes a bit of downtime.

    Here are the steps:

    Begin by provisioning the new LUNs and presenting them to the cluster.  Create disk resources around them and bring them into the SQL group.

    Shut SQL Server down, but leave the clustered disk resources online.
    Copy everything exactly from Old disk(s) to New Disk(s). 
    Take the old disks out of the resource group.
    Change the old disk drive letters to some unused letters.
    Change the new disk drive letters to the old ones.
    Change the SQL Server group dependencies so that the SQL Server service is dependent on each disk resource.
    Restart SQL.

    Check everything before deleting the old disk resources and removing the LUNs from the cluster.

    SQL only uses drive paths to locate data files.  If you change things "under the covers" so that new disks have the same folder structure and drive letters as the old ones, then SQL won't notice the difference.


    --------------------------------------------------------------------------------

    Geoff N. Hiten


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    Please let me know if my understanding is right. I have outlined for 1 instance. and i want to do 1 instance at a time and see how it goes.

    InstanceA(group 1): i see 2 physical disk resources available Disk:N and Disk:T in the cluster administrator group1.
    Disk: N is the new  resource that was added by the network admin where I need the data to moved from Disk:T(Current).

    From what i understood here are the steps.

    1. take the sql server/sql server agent of the instance(group1 in this case) offline.
    2. Copy everything exactly from Old disk(T) to new Disk(N)

    3. Take the old disks out of the resource group.(As i understood,from the cluster administrator go to group 1(for the instanceA) and go to properties of sql server service, and then go to dependencies and click on modify and then move the (Disk:T) which is under dependencies to Available Resources. Please correct me if i am wrong)?

    4.Change the old disk drive letters to some unused letters. How do i do that, do i need to do this in cluster administrator or in disk management or in both places?

    5.Change the new disk drive letters to the old ones? how do i do this, i probaly have to follow the same steps as in the above step 4.

    6.Go to Sqlserver service of the group1 instance and then click on properties and add the new drive as dependency.

    7. Restart SQL.

    Another question i have,

    1. do i need to restart the node instead of taking the particular instance offline & bringing it back online

    2. Do i need to stop the clusterservice on the passive node?

    3. Do i need to put the clusterservice on the active node to manual?

    Thanks for your help.
    Vijay

     

    Wednesday, December 14, 2011 7:59 PM

Answers

  • Hi Vijay,

    >>1. do i need to restart the node instead of taking the particular instance offline & bringing it back online The other nodes are required to be shut down while one node is adding disk resources.
    During the migration, they are not required to restart.

    >>2.Do i need to stop the clusterservice on the passive node?
    No, it is not required.

    >>3. Do i need to put the clusterservice on the active node to manual?
    In the cluster environment, the services (includes SQL Server services) should be set to manual startup.

    For more information: Migrating your SQL Cluster to a new SAN.

    Stephanie Lv

    TechNet Community Support

    • Marked as answer by Stephanie Lv Thursday, December 22, 2011 5:57 AM
    Friday, December 16, 2011 3:27 AM