Hardware migration: What to do when the replication from old to new is complete?

TrueNAS General
1

I am currently replicating a two-drive mirror pool to a four-drive RAIDZ2 pool with these settings:

General
Direction: Push
Transport: SSH

Transport Options
SSH Connection: SSH: TrueNAS mini → QNAP TrueNAS (723599d6)
Stream Compression: Disabled
Allow Compressed WRITE Records: Checked

Source
/mnt/Internal/
Recursive: Checked
Include Dataset Properties: Checked
Periodic Snapshot Tasks: Internal - auto-%Y%m%d.%H%M%S - 1 WEEK (S) - Enabled
Also include snapshots with the name: Matching naming schema

Destination
/mnt/Internal/
Destination Dataset Read-only Policy: Set
Replication from scratch: Checked
Snapshot Retention Policy: Custom
Snapshot Lifetime: 1 Week

When this is complete, what do I have to do to turn NAS functionality over to the NAS with the four-drive RAIDZ2 pool completely?

2

Are the pools named the same? If yes a configuration export and import might work. Expect adjustments to be necessary, e.g. fix the probably not matching network configuration.

I don’t know if apps are part of the saved config or if you need to recreate them manually.

3

Actually, I had done the configuration export from the old and import to the new NAS a while ago. I had hoped that I could expand a mirror into a RAIDZ2 configuration. Unfortunately, that’s not possible.

So, most everything, configuration-wise is already taken care of, as well as the different network addresses. Otherwise, the replication would not take place.

Interesting, @pmh, that you mention apps. An app migration actually is a fairly important part of the puzzle, as the old NAS has been part of a UrBackup server system, with the server running as a Docker app. I would very much like to be able to retain my backup history, instead of creating it from scratch.

4

If you have used a host path for your app data and replicated that dataset, your history will of course be there. You might have to reinstall the app from the UI.

5

And make sure that the datasets are no longer read only on the destination

6

How do I deal with the snapshots from the source (old) system that were transferred to the target (new) system? Will I be able to delete them the same way I can delete them on the source system?