diff --git a/_posts/2024-01-18-cockpit-309.md b/_posts/2024-01-18-cockpit-309.md
new file mode 100644
index 00000000..1c87aa2a
--- /dev/null
+++ b/_posts/2024-01-18-cockpit-309.md
@@ -0,0 +1,51 @@
+---
+title: Cockpit 309
+author: lis
+date: '2024-01-18'
+tags: cockpit
+slug: cockpit-309
+category: release
+summary: 'Initial Btrfs support'
+---
+
+Cockpit is the [modern Linux admin interface](https://cockpit-project.org/).
+We release regularly.
+
+Here are the release notes from Cockpit 309, cockpit-machines 305,
+cockpit-podman 83, and cockpit-ostree 199:
+
+## Initial Btrfs support
+
+Cockpit now supports showing and mounting Btrfs subvolumes, and also handles multi-device Btrfs volumes.
+
+Btrfs subvolume overview:
+
+![screenshot of btrfs subvolume overview page]({{ site.baseurl }}/images/309-btrfs-subvolume-overview.png)
+
+Btrfs volume details:
+
+![screenshot of btrfs volume details page]({{ site.baseurl }}/images/309-btrfs-volume-details.png)
+
+## Try it out
+
+Cockpit 309, cockpit-machines 305, cockpit-podman 83, and cockpit-ostree 199
+are available now:
+
+* [For your Linux system](https://cockpit-project.org/running.html)
+* [Cockpit Client](https://flathub.org/apps/details/org.cockpit_project.CockpitClient)
+
+* [Cockpit Source Tarball](https://github.com/cockpit-project/cockpit/releases/tag/309)
+* [Cockpit Fedora 39](https://bodhi.fedoraproject.org/updates/FEDORA-2024-6f7b1a314d)
+* [Cockpit Fedora 38](https://bodhi.fedoraproject.org/updates/FEDORA-2024-d2bff51992)
+
+* [cockpit-machines Source Tarball](https://github.com/cockpit-project/cockpit-machines/releases/tag/305)
+* [cockpit-machines Fedora 39](https://bodhi.fedoraproject.org/updates/FEDORA-2024-631477a3c6)
+* [cockpit-machines Fedora 38](https://bodhi.fedoraproject.org/updates/FEDORA-2024-24d7803523)
+
+* [cockpit-podman Source Tarball](https://github.com/cockpit-project/cockpit-podman/releases/tag/83)
+* [cockpit-podman Fedora 39](https://bodhi.fedoraproject.org/updates/FEDORA-2024-f637f5eec8)
+* [cockpit-podman Fedora 38](https://bodhi.fedoraproject.org/updates/FEDORA-2024-72bb8556f1)
+
+* [cockpit-ostree Source Tarball](https://github.com/cockpit-project/cockpit-ostree/releases/tag/199)
+* [cockpit-ostree Fedora 39](https://bodhi.fedoraproject.org/updates/FEDORA-2024-6cd029b4be)
+* [cockpit-ostree Fedora 38](https://bodhi.fedoraproject.org/updates/FEDORA-2024-a0306b4a31)
diff --git a/images/309-btrfs-subvolume-overview.png b/images/309-btrfs-subvolume-overview.png
new file mode 100644
index 00000000..ba0877cb
Binary files /dev/null and b/images/309-btrfs-subvolume-overview.png differ
diff --git a/images/309-btrfs-volume-details.png b/images/309-btrfs-volume-details.png
new file mode 100644
index 00000000..b9f84f09
Binary files /dev/null and b/images/309-btrfs-volume-details.png differ