driveripper disk monitor agent deployed

active/software_btrfs/btrfs.md

@@ -13,6 +13,7 @@
   - [Monitoring Disk Health](#monitoring-disk-health)
   - [Defragmenting and Compressing](#defragmenting-and-compressing)
   - [Converting ext4 to btrfs](#converting-ext4-to-btrfs)
+  - [Error Kata](#error-kata)
 
 Oracle [has decent docs here](https://docs.oracle.com/en/operating-systems/oracle-linux/8/btrfs/btrfs-ResizingaBtrfsFileSystem.html)
 
@@ -209,4 +210,27 @@ btrfs filesystem defragment -c zstd:20 /btrfs/pool0
 # Unmount and then run btrfs-convert
 umount /path/to/mount
 btrfs-convert /dev/sdX1
-```
+```
+
+## Error Kata
+
+After unplanned shutdowns, power loss, physically moving the server, or whenever
+you feel like it, it's generally a good idea to scrub your btrfs pools for
+errors and check your device stats.
+
+```bash
+export POOL=pool1
+# Find any device stat with a number > 0
+# This means there's an error
+btrfs device stats /btrfs/${POOL} | grep -vE ' 0$'
+
+# If you find an error, grab the smartctl details to check for disk error
+# Scrub the btrfs pool to check for other hidden errors
+lsblk -fs
+smartctl -a /dev/<dev>
+btrfs scrub start -Bd /btrfs/pool0
+btrfs scrub status /btrfs/${POOL}
+
+# Check the filesystem status after a scrub 
+btrfs filesystem show /btrfs/${POOL}
+```