[pve-devel] [PATCH docs v2 1/2] lvm storage: state snapshot-as-volume-chain is a technology preview

[pve-devel] [PATCH docs v2 1/2] lvm storage: state snapshot-as-volume-chain is a technology preview

[Maximiliano Sandoval]

This matches the description in the Changelog for Proxmox VE 9 [1].

[1] https://pve.proxmox.com/wiki/Roadmap#Proxmox_VE_9.0

Signed-off-by: Maximiliano Sandoval <m.sandoval@proxmox.com>
---
Differences from v1:
 - Document that snapshots as volume chain cannot be used with TPM images

 pve-storage-lvm.adoc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/pve-storage-lvm.adoc b/pve-storage-lvm.adoc
index 6928330..fc2a8ef 100644
--- a/pve-storage-lvm.adoc
+++ b/pve-storage-lvm.adoc
@@ -75,6 +75,8 @@ The snapshot functionality is managed by the PVE storage system.
 +
 Enabling or disabling this flag only affects newly created virtual disk volumes.
 
+WARNING: Snapshots as volume chains are currently a **technology preview** in {pve}.
+
 .Configuration Example (`/etc/pve/storage.cfg`)
 ----
 lvm: myspace
-- 
2.47.3



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[pve-devel] [PATCH docs v2 2/2] lvm storage: document TPM snaphshot limitations

[Maximiliano Sandoval]

Users who read about this feature unexpectedly run into this limitation.

Signed-off-by: Maximiliano Sandoval <m.sandoval@proxmox.com>
---
 pve-storage-lvm.adoc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pve-storage-lvm.adoc b/pve-storage-lvm.adoc
index fc2a8ef..6499978 100644
--- a/pve-storage-lvm.adoc
+++ b/pve-storage-lvm.adoc
@@ -75,6 +75,10 @@ The snapshot functionality is managed by the PVE storage system.
 +
 Enabling or disabling this flag only affects newly created virtual disk volumes.
 
+NOTE: It is currently not possible to store TPM disk images in qcow2 format
+footnote:[https://bugzilla.proxmox.com/show_bug.cgi?id=4693],
+preventing taking snapshots as volume chain of these images.
+
 WARNING: Snapshots as volume chains are currently a **technology preview** in {pve}.
 
 .Configuration Example (`/etc/pve/storage.cfg`)
-- 
2.47.3



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[pve-devel] applied: [PATCH docs v2 1/2] lvm storage: state snapshot-as-volume-chain is a technology preview

[Thomas Lamprecht]

On Fri, 12 Sep 2025 09:53:39 +0200, Maximiliano Sandoval wrote:
> This matches the description in the Changelog for Proxmox VE 9 [1].
> 
> [1] https://pve.proxmox.com/wiki/Roadmap#Proxmox_VE_9.0
> 
> 

Applied, thanks!

[1/2] lvm storage: state snapshot-as-volume-chain is a technology preview
      commit: c878249e8b36f3133ff61d0b3c155ab0507b18a3


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