Migrate pool to new drive, then expand the pool??

[Chessmaster71]

Hello everyone,

I looked around the Hardware and Upgrades section and found several threads that seemed close but not exactly what I was hoping to find. I currently have three old 2 TB drives that are arranges in a Z1 setup.

I have enough SATA connections to add one new 8TB NAS drive. I hope to migrate the old pool to the new drive and then add two more 8TB NAS drives in the hopes of expanding my storage space considerably. I have some experience in setting up the TrueNAS, but no experience in a drive upgrade and migration of all the HDD in the storage pool. Any guidance would be greatly appreciated.

 

[Whattteva]

Do you plan on still using the 2 TB drives at all or are you disconnecting them after?
If you just want to use the new 8 TiB pool by itself and migrate your old pool, you can setup a ZFS replication task from the old pool to the new pool. You can use this guide.

 

[Chessmaster71]

Do you plan on still using the 2 TB drives at all or are you disconnecting them after?
If you just want to use the new 8 TiB pool by itself and migrate your old pool, you can setup a ZFS replication task from the old pool to the new pool. You can use this guide.

The 2TB will be retired, Three 8tb will be enough for now. Not sure how much that will end up being total. I would like to add the second and third 8 tb drives in a ZFS RAID to provide some redundancy. I expect that the 8tb drive now is not set up for that. I need to make sure that al my photos, music, movies and documents are recoverable.

 

[Patrick M. Hausen]

You cannot change the number of disks or the redundancy of a RAIDZ vdev after the fact. So if you want a 3 disk RAIDZ1 for example, you need to create that as a new pool and use replication from the old 2 TB pool as suggested by @Whattteva.

If you intend to create a mirror from two 8 TB drives there's an even faster path. Mirror both of the 8 TB drives to the 2 TB one to create a 3-way mirror. Once completed detach the 2 TB drive. Then expand the partitions and the vdev to use all of the 8 TB.

 

[Chessmaster71]

You cannot change the number of disks or the redundancy of a RAIDZ vdev after the fact. So if you want a 3 disk RAIDZ1 for example, you need to create that as a new pool and use replication from the old 2 TB pool as suggested by @Whattteva.

If you intend to create a mirror from two 8 TB drives there's an even faster path. Mirror the both of the 8 TB drives to the 2 TB one to create a 3-way mirror. Once completed detach the 2 TB drive. Then expand the partitions and the vdev to use all of the 8 TB.

Ah thank you so much! I will look at the threads you have suggested and work with those guidelines!