service/BTCpayserver.md

@@ -131,7 +131,10 @@ procedure](#installation) and has an up to date blockchain.
 On server A:
 
     systemctl stop btcpayserver
-    tar cfz backup.tgz /var/lib/docker/volumes/
+    tar -c -z --exclude generated_bitcoin_datadir -f backup.tgz /var/lib/docker/volumes/
+
+Note that this excludes the blockchain, to save some space. It's
+assumed the target already has a copy.
 
 Copy `backup.tgz` to server B.
 
@@ -141,7 +144,7 @@ On server B:
     mv /var/lib/docker/volumes/generated_bitcoin_datadir/ /var/lib/docker/generated_bitcoin_datadir.bak/
     rm -rf /var/lib/docker/volumes/
     tar -C / -x -f -z backup.tgz
-    mv /var/lib/docker/volumes/generated_bitcoin_datadir.bak/ /var/lib/docker/generated_bitcoin_datadir/
+    mv /var/lib/docker/generated_bitcoin_datadir.bak/ /var/lib/docker/volumes/generated_bitcoin_datadir/
     /root/BTCPayServer/btcpayserver-docker/changedomain.sh btcpay.torproject.org
     systemctl start btcpayserver