---
date: 2026-04-01T13:59:14.462Z
category: bsd/zfs
aiTextLevel: "0"
syndication:
  - https://blog.giersig.eu/notes/bed63/
updated: 2026-04-01T14:01:45.287Z
mpUrl: https://blog.giersig.eu/notes/bed63/
permalink: /notes/bed63/
---

The beauty of ZFS! I’ve got some extra space, so I’m moving some large jails there, where they can live happily ever after.

Step 1 - Stop both jails.

Step 2 - Create parent datasets on new pool "store":
```
zfs create -o mountpoint=none store/bastille
zfs create -o mountpoint=none store/bastille/jails
```
Step 3 - Snapshot both jail datasets:
```
zfs snapshot -r zroot/bastille/jails/audio@migrate
zfs snapshot -r zroot/bastille/jails/cloud@migrate
```
Step 4 - Transfer to "store":
```
zfs send -R zroot/bastille/jails/audio@migrate | zfs recv -o mountpoint=none store/bastille/jails/audio
zfs send -R zroot/bastille/jails/cloud@migrate | zfs recv -o mountpoint=none store/bastille/jails/cloud
```

Step 5 - Unmount old datasets and disable auto-mount:
```
zfs unmount -f zroot/bastille/jails/audio
zfs unmount -f zroot/bastille/jails/cloud
zfs set canmount=noauto zroot/bastille/jails/audio
zfs set canmount=noauto zroot/bastille/jails/audio/root
zfs set canmount=noauto zroot/bastille/jails/cloud
zfs set canmount=noauto zroot/bastille/jails/cloud/root
```
Step 6 - Set mountpoints on new datasets (children inherit):
```
zfs set mountpoint=/usr/local/bastille/jails/audio store/bastille/jails/audio
zfs set mountpoint=/usr/local/bastille/jails/cloud store/bastille/jails/cloud
```
Step 7 - Mount new datasets:
```
zfs mount store/bastille/jails/audio
zfs mount store/bastille/jails/audio/root
zfs mount store/bastille/jails/cloud
zfs mount store/bastille/jails/cloud/root
```
Step 8 - Quick sanity check:
```
ls /usr/local/bastille/jails/audio/root/srv/funkwhale/
ls /usr/local/bastille/jails/cloud/root/usr/local/www/cloud/
```

Step 9 - destroy the old datasets:
```
zfs destroy -r zroot/bastille/jails/audio
zfs destroy -r zroot/bastille/jails/cloud
```