Clone Pool Data to Another Pool Without Changing App Configs

Clone Pool Data to Another Pool Without Changing App Configs

If you’re using a TrueNAS pool and want to create a new pool with new hard drives without changing the app configs, cloning the pool data is possible. This article will cover the key concepts and provide detailed context on how to clone pool data without changing the app configs. By following the steps outlined below, you can successfully transfer your data to a new pool without disrupting your current setup.

Understanding TrueNAS Pools

TrueNAS pools are created by grouping one or more disks together. This provides a logical volume for the storage, management, and protection of data. Pools can be created with different RAID configurations, depending on the number of disks and the required redundancy. Once a pool is created, you can format it and start using it for storing data.

How Cloning Works

Cloning involves creating an exact copy of the data from one pool to another. In the case of TrueNAS, this process can be accomplished using the ZFS file system's built-in cloning features. This method captures every block of data, ensuring an exact duplicate of the original pool.

Cloning a TrueNAS Pool to a New Pool

To clone your TrueNAS pool data to a new pool without changing your app configs, follow these steps:

1. Create a new pool with the desired RAID configuration and disks.
2. Identify the original pool and the new pool for the cloning process.
3. Use the following command to clone the original pool to the new pool:

Replace pool1/dataset and pool2/dataset with the actual names of your original and new pool datasets.

Additional Considerations

Here are a few additional aspects to keep in mind when cloning a TrueNAS pool:

• The target pool should have the same or larger capacity than the source pool.
• The cloned pool will have the same properties as the original pool (e.g., compression, deduplication, and copy-on-write features).
• Cloning can take some time, depending on the size of the pool and the speed of the disks.

References

• TrueNAS 12.0 User Guide by iXsystems
• "How to Clone a TrueNAS SCALE Pool" by Jake Martin (https://www.ixsystems.com/blog/how-to-clone-a-truenas-scale-pool/)
• ZFS Administration Guide by Oracle (https://docs.oracle.com/cd/E19253-01/819-5461/zfsadmin-18/index.html)