megacli to graphite

megacli2graphite.sh

#!/bin/bash

# set my hostname
HOSTNAME=`hostname -s`

# Set Graphite host
GRAPHITE=your.graphite.instance
GRAPHITE_PORT=2003

# Iterate through all the disks (polling live from the raid controller)
for i in `/opt/MegaRAID/MegaCli/MegaCli64 -PDList -a1 | grep -A 1 "Enclosure Device ID" | cut -d: -f2 | grep -v '\-\-' | sed -e '$!N; s/\n /:/'`
do

# remove the colon from the disk id for easier graphite naming
    DISK=`echo $i | sed -e 's/:/-/'`
    DATE=`date +%s`

    /opt/MegaRAID/MegaCli/MegaCli64 -PDInfo -PhysDrv [$i] -a1 | grep -A 3 "Media Error Count" | sed -e 's/ //g' | sed -e "s/^/${HOSTNAME}\.megacli\.${DISK}\./" | sed -e 's/:/ /' | sed -e "s/$/ ${DATE}/" | nc $GRAPHITE $GRAPHITE_PORT

done

This will get you:
MediaErrorCount
OtherErrorCount
PredictiveFailureCount
LastPredictiveFailureEventSeqNumber (if this is going up, fail that drive yo)