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#!/bin/sh
#
# Show SMART stats
#
helpstr="
smart: Show SMART temperature and error stats (specific to drive type)
smartx: Show SMART extended drive stats (specific to drive type).
temp: Show SMART drive temperature in celsius (all drives).
health: Show reported SMART status (all drives).
r_proc: Show SMART read GBytes processed over drive lifetime (SAS).
w_proc: Show SMART write GBytes processed over drive lifetime (SAS).
r_ucor: Show SMART read uncorrectable errors (SAS).
w_ucor: Show SMART write uncorrectable errors (SAS).
nonmed: Show SMART non-medium errors (SAS).
defect: Show SMART grown defect list (SAS).
hours_on: Show number of hours drive powered on (all drives).
realloc: Show SMART reallocated sectors count (ATA).
rep_ucor: Show SMART reported uncorrectable count (ATA).
cmd_to: Show SMART command timeout count (ATA).
pend_sec: Show SMART current pending sector count (ATA).
off_ucor: Show SMART offline uncorrectable errors (ATA).
ata_err: Show SMART ATA errors (ATA).
pwr_cyc: Show SMART power cycle count (ATA).
serial: Show disk serial number.
nvme_err: Show SMART NVMe errors (NVMe).
"
script=$(basename "$0")
if [ "$1" = "-h" ] ; then
echo "$helpstr" | grep "$script:" | tr -s '\t' | cut -f 2-
exit
fi
smartctl_path=$(which smartctl)
if [ -b "$VDEV_UPATH" ] && [ -x "$smartctl_path" ]; then
raw_out=$(eval "sudo $smartctl_path -a $VDEV_UPATH")
# What kind of drive are we? Look for the right line in smartctl:
#
# SAS:
# Transport protocol: SAS
#
# SATA:
# ATA Version is: 8
#
# NVMe:
# SMART/Health Information (NVMe Log 0xnn, NSID 0xnn)
#
type=$(echo "$raw_out" | grep -m 1 -Eo '^ATA|NVMe|SAS$')
out=$(echo "$raw_out" | awk '
# SAS specific
/read:/{print "rrd="$4"\nr_cor="$5"\nr_proc="$7"\nr_ucor="$8}
/write:/{print "rwr="$4"\nw_cor="$5"\nw_proc="$7"\nw_ucor="$8}
/Non-medium error count/{print "nonmed="$4}
/Elements in grown defect list/{print "defect="$6}
# SAS common
/Drive Temperature:/{print "temp="$4}
# Status can be a long string, substitute spaces for '_'
/SMART Health Status:/{printf "health="; for(i=4;i<=NF-1;i++){printf "%s_", $i}; printf "%s\n", $i}
/number of hours powered up/{print "hours_on="$7}
/Serial number:/{print "serial="$3}
# SATA specific
/Reallocated_Sector_Ct/{print "realloc="$10}
/Reported_Uncorrect/{print "rep_ucor="$10}
/Command_Timeout/{print "cmd_to="$10}
/Current_Pending_Sector/{print "pend_sec="$10}
/Offline_Uncorrectable/{print "off_ucor="$10}
/ATA Error Count:/{print "ata_err="$4}
/Power_Cycle_Count/{print "pwr_cyc="$10}
# SATA common
/Temperature_Celsius/{print "temp="$10}
/Airflow_Temperature_Cel/{print "temp="$10}
/SMART overall-health self-assessment test result:/{print "health="$6}
/Power_On_Hours/{print "hours_on="$10}
/Serial Number:/{print "serial="$3}
# NVMe common
/Temperature:/{print "temp="$2}
/SMART overall-health self-assessment test result:/{print "health="$6}
/Power On Hours:/{gsub("[^0-9]","",$4); print "hours_on="$4}
/Serial Number:/{print "serial="$3}
/Power Cycles:/{print "pwr_cyc="$3}
# NVMe specific
/Media and Data Integrity Errors:/{print "nvme_err="$6}
END {ORS="\n"; print ""}
');
fi
# if type is not set by now, either we don't have a block device
# or smartctl failed. Either way, default to ATA and set out to
# nothing
if [ -z "$type" ]; then
type="ATA"
out=
fi
case $script in
smart)
# Print temperature plus common predictors of drive failure
if [ "$type" = "SAS" ] ; then
scripts="temp|health|r_ucor|w_ucor"
elif [ "$type" = "ATA" ] ; then
scripts="temp|health|ata_err|realloc|rep_ucor|cmd_to|pend_sec|off_ucor"
elif [ "$type" = "NVMe" ] ; then
scripts="temp|health|nvme_err"
fi
;;
smartx)
# Print some other interesting stats
if [ "$type" = "SAS" ] ; then
scripts="hours_on|defect|nonmed|r_proc|w_proc"
elif [ "$type" = "ATA" ] ; then
scripts="hours_on|pwr_cyc"
elif [ "$type" = "NVMe" ] ; then
scripts="hours_on|pwr_cyc"
fi
;;
*)
scripts="$script"
esac
with_vals=$(echo "$out" | grep -E "$scripts")
if [ ! -z "$with_vals" ]; then
echo "$with_vals"
without_vals=$(echo "$scripts" | tr "|" "\n" |
grep -v -E "$(echo "$with_vals" |
awk -F "=" '{print $1}')" | awk '{print $0"="}')
else
without_vals=$(echo "$scripts" | tr "|" "\n" | awk '{print $0"="}')
fi
if [ ! -z "$without_vals" ]; then
echo "$without_vals"
fi
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