Hi,
I would say that sentence is misleading and should be:
- For critical data, it is recommended to do object copy operations from the deduplication store to a tape.
Meaning that it is recommended to do object copy. Object copy is done the same way as for any other device, no need to stop the store.
- Do not write to the store while backing it up.
If you are doing a FS backup of store root, than make sure no-one is writing to it. For an example put the SOS in read only mode or stop the service.
Regards