From: Fiona Ebner <f.ebner@proxmox.com>
To: pve-devel@lists.proxmox.com
Subject: [PATCH docs v2 1/3] close #7204: storage: lvm thin: document that thin pools must have zeroing enabled
Date: Mon, 21 Sep 2026 10:56:56 +0200 [thread overview]
Message-ID: <20260921085707.70272-2-f.ebner@proxmox.com> (raw)
In-Reply-To: <20260921085707.70272-1-f.ebner@proxmox.com>
Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
---
pve-storage-lvmthin.adoc | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/pve-storage-lvmthin.adoc b/pve-storage-lvmthin.adoc
index 83f65a3..03169e0 100644
--- a/pve-storage-lvmthin.adoc
+++ b/pve-storage-lvmthin.adoc
@@ -23,6 +23,12 @@ lvcreate -L 100G -n data pve
lvconvert --type thin-pool pve/data
----
+WARNING: The `zero` property for the thin pool must be set or certain operations
+for VM images may lead to data corruption! The property is controlled via the
+`allocation/thin_pool_zero` LVM configuration option and is enabled by default.
+Use `lvs --select 'lv_attr =~ ^t' --options lv_name,zero` and check that there
+is a value `zero` in the output below the `Zero` heading, for each thin pool
+that is used as a {pve} storage.
Configuration
~~~~~~~~~~~~~
--
2.47.3
next prev parent reply other threads:[~2026-09-21 8:57 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-21 8:56 [PATCH-SERIES docs/storage v2 0/3] close #7204: document and check that thin pools have zeroing enabled Fiona Ebner
2026-09-21 8:56 ` Fiona Ebner [this message]
2026-09-21 8:56 ` [RFC storage v2 2/3] lvm plugin: list volumes: also query 'zero' property Fiona Ebner
2026-09-21 8:56 ` [RFC storage v2 3/3] close #7204: lvm thin plugin: die if thin pool does not have zeroing configured Fiona Ebner
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