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PVE 8.2 qcow2 Disk Changes from Thin Provisioning to Thick Provisioning

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I am running virtual machines on Proxmox VE 8.2, where all VMs are stored on local file storage with the ext4 filesystem format. Ceph storage is used as a shared resource for temporary use by VMs. Typically, when a host requires maintenance, I need to quickly migrate VMs to the Ceph storage.

During a failure migration, I moved a qcow2 disk from local storage to Ceph storage. After the host was restored, when migrating the qcow2 disk back from Ceph to local storage, I noticed that the qcow2...

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