Script to easily display Linux raid S.M.A.R.T. status

build-md-drives-data.sh

#!/bin/bash

if [ -z "$1" ] ; then
    dev=/dev/md0
else
    dev=$1
fi

mdadm --detail $dev |
awk ' h == 1 { print $0; } /Number.*Major.*Minor.*RaidDevice.*State/ { h = 1; } ' |
tr \  \\n |
grep dev |
sed s/1// |
sort -u |
while read drv ; do
    smartctl -a $drv |
    sed 's/Serial.Number: *\(WD-\)\?\(.*\)/0 Serial_Number b c d e f g h \2/' |
    sed 's/User.Capacity.*\[\(.*\)\..*/0 User_Capacity b c d e f g h \1/' |
    awk ' /Serial.Number/ { print $0; } /User.Capacity/ { print $0; } /^$/ { h = 0; } h == 1 { print $0; } /ATTRIBUTE_NAME.*RAW_VALUE/ { h = 1; } ' |
    while read a name b c d e f g h val ; do
        echo $drv,$name,$val
        if [ "$name" == "Power_On_Hours" ] ; then
            echo $drv,Power_On_Days,$((val/24))
            echo $drv,Power_On_Years,`echo "$val/8760" | bc -l`
        fi
    done
done |
sed s/.dev.// |
awk -F, '
    !($1 in drives) { drives[$1]; }
    !($2 in headers) { headers[$2]; }
    { vals[$1][$2] = $3; }
    END {
        printf("drive,");
        for (drv in drives) {
            printf("%s,", drv);
        }
        printf("\n");
        for (hdr in headers) {
            printf("%s,", hdr);
            for (drv in drives) {
                fmt = "%i,";
                if (hdr == "Serial_Number") { fmt = "%s,"; }
                if (hdr == "Power_On_Years") { fmt = "%0.2f,"; }
                printf(fmt, vals[drv][hdr]);
            }
            printf("\n");
        }
    } ' |
sed 's/,$//' | column -t -s,