Use mountpoints instead of block devices so that RAIDs don't get angry

usr/local/bin/btrfs-maintenance

@@ -1,16 +1,19 @@
 #!/bin/bash
 set -e
 
-# Find all BTRFS formatted partitions
+# Find the mountpoint for all BTRFS formatted partitions
 PARTITIONS=()
 for i in $(lsblk -nrpo "name" -e 1,7,11); do
     if [[ "$(lsblk -no FSTYPE "$i")" == "btrfs" ]]; then
-        PARTITIONS+=("$i")
+        PARTITIONS+=("$(findmnt -v -y --real -f -o TARGET -n $i)")
     fi
 done
 
+# Remove duplicates, semi-jankily
+PARTITIONS=($(echo ${PARTITIONS[@]} | tr ' ' '\n' | sort -u | tr '\n' ' '))
+
 # Reallocate blocks that are less than 95% used
-for i in ${PARTITIONS[*]}; do
+for i in ${PARTITIONS[@]}; do
     {
         echo "Starting balance on $i"
         btrfs balance start -dusage=95 "$i"
@@ -22,7 +25,7 @@ done
 wait
 
 # Scrub all partitions
-for i in ${PARTITIONS[*]}; do
+for i in ${PARTITIONS[@]}; do
     {
         echo "Starting scrub on $i"
         btrfs scrub start -B "$i"