Kopia and block
* mount pvc as a device
* in the mover pod.. get device path
* kopia calls the list files
* cc implemented wrapper on top of kopia, intercept metrics r,w etc
* when kopia calls list files the wrapper returns the device path
* then copies the device as a file

* restore w/ kopia/block
* using the wrappers on kopia int
* first 10 blocks as 0, for example.. seek to offset to the 10th blocks.
* creating holes

* kopia natively does not handle sparse files

## links
* https://github.com/kubernetes/enhancements/blob/0842a7ac263363ff45aac1cdddc617b5a468bfc8/keps/sig-storage/3314-csi-changed-block-tracking/README.md

* https://issues.redhat.com/browse/CNV-25956
* https://github.com/backube/volsync/issues/556
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