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That sounds like a very complicated way to do a full OS backup.

Dead easy, 10 min, can't fail alternative for home projects: use a VM instead, switch off the VM, copy the disk file, switch the VM back on. Use NVMe SSDs and depending on the size, you can probably do an automated daily backup with minimal downtime.

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Anyone have a solution that can snapshot a running VM that has a PCI or PCIe card passed through to the guest OS? I use snapshots on ESXi, but they don't work for guests that have a card passed-through.

Are you asking for a recommendation on how to do this with ESXi or a recommendation for an alternative to ESXi?

Either is fine. If it's within-ESXi, that's a little easier, but I'm not tightly/inextricably wed to that hypervisor.

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