From 7f979b027a4b4ee883bf83c56a229f733ed8bb76 Mon Sep 17 00:00:00 2001
From: svemagie <svemagie@noreply.gitea.giersig.eu>
Date: Wed, 1 Apr 2026 15:59:14 +0200
Subject: [PATCH] create note post

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+---
+date: 2026-04-01T13:59:14.462Z
+category: bsd/zfs
+mpSyndicateTo:
+  - https://blog.giersig.eu/
+aiTextLevel: "0"
+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 dataset
+```
+zfs destroy -r zroot/bastille/jails/audio
+zfs destroy -r zroot/bastille/jails/cloud
+```