Get Free Space for Disks

space.sh

#!/bin/bash
disks=("/dev/mmcblk0p1" "/dev/mmcblk0p2")
names=("My First Disk" "My Disk #2")

i=0
diskCount=${#disks[@]}

for (( i = 0; i < diskCount; i++ )); do
  diskPath=${disks[$i]}
  diskName=${names[$i]}
  dfCommand=`df -h | grep -w "$diskPath"`
  diskUsagePct=`echo "$dfCommand" | awk '{print $5}'`
  diskFreeSpace=`echo "$dfCommand" | awk '{print $4}'`

  echo "$diskName ($diskPath), Free Space: $diskFreeSpace"
done

Edit Arrays "disks" and "names" to indicate paths to disks and a human readable name.