DR of scale up Media agent

  • 22 July 2021
  • 6 replies

Userlevel 2
Badge +7

Hello, IHAC who has a NetApp eseries as their disk library. When MA1 writing to a lun fails, the lun needs to be mounted on another MA2 to restore the backups. What is a standard procedure in Commvault that could be used to open the same mount path from a different media agent. From the Commcell GUI one can only create a new mount path. The goal is to be able to restore the data protected to this LUN from a different MA.


Best answer by euMike 22 July 2021, 21:29

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6 replies

Userlevel 6
Badge +14

Hello @neuwiesener ,


You could have the LUN mapped to the other MA  and configure that Mount path as Shared, refer to the documentation here:


Best Regards,


Userlevel 7
Badge +23

@neuwiesener , if you have the LUN presented as a CIF or inc share, then both can access as needed.

If the LUN is a local drive/mount on MA1 and it goes down, then it won’t be accessible, and if MA1 and MA2 both think it is local, you might get data corruption from simultaneous writing.

Userlevel 2
Badge +7

@MichaelCapon Netapp eseries provides only block protocols. There is a reference architecture for that. What is the procedure to get access to the data already written to a lun.  The lun/windows volume can be brought back online on a different server. How can we tell commvault to import the mount path. Because whenever a mountpath is created a new folder gets created and it might have a GUID associated with it. 


Userlevel 4
Badge +10

Hi @neuwiesener ,

The documentation link provided by MichaelCapon has all the information you need:

  1. install Commvault software on your new MA
  2. re-map LUNs to your new MA
  3. Commcell Console → Storage Resources → Libraries → <your disk library> → <mount path> → Properties → Sharing → Share: select your new MA from step 1; select r/w access; select Local Path: browse for folder on your new MA → OK
  4. (optional) select your old MA and remove it from controllers list
  5. repeat steps 3 and 4 for each mount path in your library

If deduplication is in use, you will need to take care of DDB partitions too:

Userlevel 7
Badge +23

Not too familiar with e-series but if it can support active/passive shared storage (from memory these types of DAS units allow two hosts?) you could use windows failover cluster as well to automate the failover. When you ‘share’ a mount path it can also be mapped to a local drive on another media agent.

Userlevel 2
Badge +7

Thanks all. I shall try out the steps!