Check disk space on system. Exclude list can include more than one drive, example given in the EXCLUDE_LIST.

chkspace.sh

#!/bin/sh

ALERT=90
EXCLUDE_LIST="/dev/hdd1|/dev/hdd2"

main_prog() {
    while read -r output;
    do
        usep=$(echo "$output" | awk '{ print $1}' | cut -d'%' -f1)
        partition=$(echo "$output" | awk '{print $2}')
        if [ "$usep" -ge "$ALERT" ] ; then
            echo "Running out of space \"$partition ($usep%)\" on server $(hostname), $(date)" | \
        fi
    done
}
if [ "$EXCLUDE_LIST" != "" ] ; then
  df -H | grep -vE "^Filesystem|tmpfs|cdrom|${EXCLUDE_LIST}" | awk '{print $5 " " $6}' | main_prog
else
  df -H | grep -vE "^Filesystem|tmpfs|cdrom" | awk '{print $5 " " $6}' | main_prog
fi