Add initial restore instructions to guide

docs/manual/Quick-Start Guides/19-backup-restore.md

@@ -29,8 +29,53 @@ One could create a normal recursive(!) replication of the `ix-volumes` dataset u
 
 <a href="https://truecharts.org/_static/img/backup/includebackups.png"><img src="https://truecharts.org/_static/img/backup/includebackups.png" width="100%"/></a>
 
+It's also important to ensure you keep regular config backups of the SCALE system itself, preferably right after the Apps backup above).
+However this is not part of this guide and we will assume you've done so yourself.
+
+
+##### Checking Backups
+
+To make which backups are present, one can use the following command in a shell:
+
+`cli -c "app kubernetes list_backups"`
+
 ## Restore
 
+One of the most important parts of backups is to ensure they can be restored.
+There are two scenario's for a restore:
+
+1. Reverting a working system
+
+2. Total System Restore
+
+##### Reverting a running system
+
+Reverting a running system is rather trivial. But there are a few caveats:
+
+- This will reinitialise the kubernetes node, which means all kubernetes objects that are not deployed using the Apps system will get reverted
+- You CANNOT revert a single Apps
+
+To revert an existing system, the process is as follows:
+
+1. List your current backups using `cli -c "app kubernetes list_backups"`
+
+2. Pick a backup to revert and note it's name
+
+3. Run: `cli -c "app kubernetes list_backups { 'backup_name': 'BACKUPNAME'}` (where you replease BACKUPNAME with the name of the backup you selected above)
+
+
+##### Total System restore
+
+Sometimes you either need to wipe your Pool, Migrate to a new Pool or restore a system completely.
+With the above steps this is all very-much-possible.
+
+0. Do not initiate the (select a pool for) Apps system yet.
+
+1. Optional: When the SCALE system itself is also wiped, ensure to restore it using a SCALE config export **first**.
+
+2. Using ZFS replication, move back the previously backed-up `ix-applications` dataset.
+
+3. Continue with the steps listed on `Reverting a running system`
 
 #### Video Guide