From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from gate001.proxmox.com (gate001.proxmox.com [45.144.208.40]) by lore.proxmox.com (Postfix) with ESMTPS id 9E9741FF09C for ; Mon, 21 Sep 2026 10:57:32 +0200 (CEST) Received: from gate001.proxmox.com (localhost.localdomain [127.0.0.1]) by gate001.proxmox.com (Proxmox) with ESMTP id ED497215E1; Mon, 21 Sep 2026 10:57:16 +0200 (CEST) From: Fiona Ebner 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 Message-ID: <20260921085707.70272-2-f.ebner@proxmox.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260921085707.70272-1-f.ebner@proxmox.com> References: <20260921085707.70272-1-f.ebner@proxmox.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Bm-Milter-Handled: 55990f41-d878-4baa-be0a-ee34c49e34d2 X-Bm-Transport-Timestamp: 1789981030473 X-SPAM-LEVEL: Spam detection results: 0 AWL 0.567 Adjusted score from AWL reputation of From: address DMARC_MISSING 0.1 Missing DMARC policy KAM_DMARC_STATUS 0.01 Test Rule for DKIM or SPF Failure with Strict Alignment (newer systems) RCVD_IN_DNSWL_MED -2.3 Sender listed at https://www.dnswl.org/, medium trust SPF_HELO_NONE 0.001 SPF: HELO does not publish an SPF Record SPF_PASS -0.001 SPF: sender matches SPF record Message-ID-Hash: HQBSV4R7KCXUYSAYL72OPCEKVDSHNHDP X-Message-ID-Hash: HQBSV4R7KCXUYSAYL72OPCEKVDSHNHDP X-MailFrom: f.ebner@proxmox.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; loop; banned-address; emergency; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header X-Mailman-Version: 3.3.10 Precedence: list List-Id: Proxmox VE development discussion List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: Signed-off-by: Fiona Ebner --- 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