How to disconnect old disk?

Last post 02-07-2019, 10:41 AM by Ken_H. 6 replies.
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  • How to disconnect old disk?
    Posted: 02-06-2019, 12:01 PM

    Hello everyone,

    A few months ago I implemented a three node HyperScale solution at my main datacenter to serve as my primary backup destination.  All storage policies were updated to use this new policy and it was been working well.  Now I'd like to remove my old disk which is two HP MSA disk devices.

    In the CommCell Browser, I can right-click > View Contents on the drives associated to the MSA and CommVault says there are no backups stored there.

     

    I thought it might be as simple as right-click > Delete Mount Path but when I try this I get the obligatory "Are you sure?" question followed by the error "Mount path is used by a Deduplication database":

     

    When I right-click > Properties on the drive letters I see DDB Name="SIDB_GDP1-Windermere..."

     

    I'm not sure what to do.  How can I get the MSA disks disconnected from CommVault?

    Ken

  • Re: How to disconnect old disk?
    Posted: 02-06-2019, 12:56 PM

    When I look at the properties for the deduplication engine associated with the MSA disk I see a line that reads:

    Total size of Application Data across all the DDB(s):  0 bytes

    By comparison, the properties for the HyperScale deduplication engine shows:

    Total size of Application Data across all the DDB(s):  337.42 TB

    So it appears I need to delete the deduplication engine for the old disk.  A right-click on the old one gives a menu with only one item (Properties) so it's not obvious what needs to be done to delete this.

    Any suggestions would be appreciated.

    Ken

  • Re: How to disconnect old disk?
    Posted: 02-06-2019, 1:46 PM

    Within the Console GUI, I selected Home (menu item) > Control Panel (from ribbon) > Expert Storage Configuration (within the Storage section) > selected the media agent the MSA drives are connected to and clicked Add, OK.  This presents me a window showing the two libraries connected to this server:  My MSA disks and my tape library.

    If I right-click on the MSA library there is a "Deconfigure" option.  I'll try reaching out to someone at CommVault to confirm these are the proper steps to follow.

  • Re: How to disconnect old disk?
    Posted: 02-07-2019, 7:27 AM

    Hi Ken

    The proper procedure to decommission a Disk Library with DDB association involves the following:

    • You will need to remove the association of the DDB to the Mount Paths of the Disk Library, which will require:
      • Sealing the DDB 
      • Either manually age out all the Jobs (assuming it is already Aux Copied to the new Site) or wait for all the Jobs to meet retention 
      • Once all the associated Jobs are aged from the DDB, the DDB will have no more association to the Mount Paths.
      • You can then safely remove the Mount Paths
      • Remove the Disk Library 
      • Release the License 
      • Remove/Decommission the MediaAgent. 
    Note - once the Sealed DDB has completely dis-associated from the Mount Path, after 24 hours it will be automatically removed from the GUI
     
    Obviously the above is just a general guideline, and it is important to align with the organizations need and requirement before doing Backup Job deletion. 
     
    Hopefully this helps
     
    Thank you 
     Winston
  • Re: How to disconnect old disk?
    Posted: 02-07-2019, 10:35 AM

    In discussion with local CommVault staff, I used the browser-based Admin GUI to delete the disk from the list of available Storage Pools.  This appears to have deleted the DDB associated with that disk.  Next I tried to delete the disk from the list of Storage Targets but got the error "The mount path has valid backup data". 

    I traced the problem back to a storage policy named "CommServeDR" that was set up prior to me starting to work with CommVault.  I don't know what this is but it was easy enough to update the Primary copy to the new HyperScale disk.  This backup runs every hour and the problem is that it has a 7 day retention which means I won't be able to remove my old disk until some time next week.

    If any other customers read this, I would recommend opening a ticket with CommVault support.  This is certainly not as easy a process as I had originally expected.

    Winston, I appreciate the detailed answer you provided and will mark it as the solution.

    Ken

  • Re: How to disconnect old disk?
    Posted: 02-07-2019, 10:38 AM

    In discussion with local CommVault staff, I used the browser-based Admin GUI to delete the disk from the list of available Storage Pools.  This appears to have deleted the DDB associated with that disk.  Next I tried to delete the disk from the list of Storage Targets but got the error "The mount path has valid backup data". 

    I traced the problem back to a storage policy named "CommServeDR" that was set up prior to me starting to work with CommVault.  I don't know what this is but it was easy enough to update the Primary copy to the new HyperScale disk.  This backup runs every hour and the problem is that it has a 7 day retention which means I won't be able to remove my old disk until some time next week.

    If any other customers read this, I would recommend opening a ticket with CommVault support.  This is certainly not as easy a process as I had originally expected.


    Winston, I appreciate the detailed answer you provided and will mark it as the solution.

    Ken

  • Re: How to disconnect old disk?
    Posted: 02-07-2019, 10:41 AM

    Apologies for the duplicate posts, I received a connection timeout and resubmitted the post a second time thinking the first had failed.  *Sigh*  Technology.

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