Hello Zawro,

Yes, you can move the Index and DDB to the new MA and post associating the disk from old MA to new MA you need to update the Mount Path sharing accordingly i.e updating the new MA in the Mount Path sharing. 

So it should work if I:

1. Instal new Meda Agent
2. Add to Commvault
3. Offline(maintenance) Old MA and new MA
4. Move DDB, Move Index from old MA to new MA
5. Share mount patch as local path to new MA as Read/Write?
6. Change mount patch - delet connection to old MA, how ?
7. Online new MA

After all, I should have the same situation in Commvault (backups, jobs, ddb, posibilities to restore jobs), because I move all data from old MA to new MA or could I lose something?

Hello,

Here is the procedure: 

1. Install the new MA.
2. Add to Commvault Console.
3. Move DDB and Index to new MA as per DOC. 
4. Move the library and Media Agents in maintenance mode. 
5. Physically attach the disk/path to the new MA server. 
6. Remove the library and new MA from maintenance and update the mount path to new MA with read/write. 
7.  Remove old MA from sharing. 

https://documentation.commvault.com/2023e/expert/moving_deduplication_database.html

https://documentation.commvault.com/2023e/expert/changing_indexing_mediaagent_using_change_index_server_workflow.html

Ok, so I have some additional questions during preparation to migrate to the new MA.

Before all this change I Matainance MA or Disable it.

I wanna replace OLD MA to new MA. So I use robocopy with /mirror and /copyall to copy DDB and Index( on the same place and disk letter).

Then I turn off OLD MA and on NEW MA change IP and name (the same that have OLD),

The next step is to install Commvault MA on NEW, and at the end of the installation, agree that there is a Client with the same name and replace it.

Do you think it should work?

And if something is wrong I have old Ma and can go back to him,