What is the best way to keep a sync *copy* of all Bitcoin core data on an external drive?

How do you always have it? Number 2 Copying Bitcoin core data (blocks, indexes, chain states) to an external drive?

Drives are connected to nodes only if they are not connected to individual offline workstations.

Ideally, there’s no need to stop bitcoind On a node at any point. So far I’ve been using this command:

rsync -P -h -a --delete /home/satoshi/.bitcoin/ /mnt/bitcoin-copy/

However, it can take a particularly long time after the drive has been disconnected for a while. More importantly, chain states take too long to synchronize and get damaged.

You will stop the node during copy corrections for that issue, but if possible, even a more bulletproof or automated solution. Is Raid 1 also an option in this scenario?

Thank you in advance!