Best Practice for NAS Configuration on Commvault as Library

hello ​@0ber0n 

Let's go over it step by step.

The block size can be either "4KB" or "8KB," with the default set to "8KB." The storage admin or Huawei support will decide the best block size based on how the storage pools are designed.

Just a heads-up: once it's set, the block size can’t be changed.

For consumption quotas, you can create a role for each LUN or use Commvault until the mount path reaches its capacity. Both options work, but personally, I prefer handling it on the storage side.


If you're referring to creating 5 LUNs, each 10TB, or one 50TB LUN, the storage admin can run I/O tests to determine the best practice. If you're talking about Commvault mount paths, based on your I/O results, if everything is performing well, you can configure a single UNC path (at the OS level) with multiple mount paths, or you can configure several UNC paths and use each path as a separate mount path (I personally prefer each UNC Path to have its own mount path).

Use 3 Media Agents in this case, and I believe your back-end size is up to 450TB. If that's the case, I recommend using 2 DDB disks for each media agent instead of just one partition. It's also recommended to use SSDs, though it's not mandatory.

As for your final question on best practices for NAS storage, I suggest sharing mount paths with each media agent. Using Alternate Data Paths or Commvault GridStor can be really helpful if you encounter issues with one or more media agent/s. If one media agent is active, the backup jobs will still run smoothly.

Best Regards,
Mohamed Ramadan
Data Protection Specialist