Post · bonfire.cafe

@dvl@bsd.network · last week

How would you move the zroot zpool from a #ZFS mirror of 2x 450GB to 2x 128GB devices?

Ideally, I'd use `zpool replace` but that can't go to smaller devices.

Sounds like I must:

* run gpart on the new drives
* boot live thumbdrive
* zfs send receive
* stamp bootcode

Hagen Bauer :fckafd:

@hbauer@social.caserio.de replied · last week

@dvl I have done it like this https://www.hagen-bauer.de/2025/08/zfs-migration-to-smaller-disk.html

Migrating a ZFS Pool to smaller disks

In this document I would like to document my successful migration (completed 2 weeks ago) of a ZFS mirror to 2 smaller disks. I started the server on 2 3TB spinning discs but I dont need the size and wanted to move to 2 2TB NVME drives. I have done this excercise multiple times on a testsystem be...

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