Created
January 7, 2022 16:25
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Check SSD Drive Health through SMART
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#!/bin/bash | |
####################################### | |
# Variables # | |
####################################### | |
SSD_DEVICE="$1" | |
ON_TIME_TAG="Power_On_Hours" | |
WEAR_COUNT_TAG="Wear_Leveling_Count" | |
LBAS_WRITTEN_TAG="Total_LBAs_Written" | |
LBA_SIZE=512 # Value in bytes | |
BYTES_PER_MB=1048576 | |
BYTES_PER_GB=1073741824 | |
BYTES_PER_TB=1099511627776 | |
####################################### | |
# Get total data written... # | |
####################################### | |
# Get SMART attributes | |
SMART_INFO=$(sudo /usr/sbin/smartctl -A "$SSD_DEVICE") | |
# Extract required attributes | |
ON_TIME=$(echo "$SMART_INFO" | grep "$ON_TIME_TAG" | awk '{print $10}') | |
WEAR_COUNT=$(echo "$SMART_INFO" | grep "$WEAR_COUNT_TAG" | awk '{print $4}' | sed 's/^0*//') | |
LBAS_WRITTEN=$(echo "$SMART_INFO" | grep "$LBAS_WRITTEN_TAG" | awk '{print $10}') | |
# Convert LBAs -> bytes | |
BYTES_WRITTEN=$(echo "$LBAS_WRITTEN * $LBA_SIZE" | bc) | |
MB_WRITTEN=$(echo "scale=3; $BYTES_WRITTEN / $BYTES_PER_MB" | bc) | |
GB_WRITTEN=$(echo "scale=3; $BYTES_WRITTEN / $BYTES_PER_GB" | bc) | |
TB_WRITTEN=$(echo "scale=3; $BYTES_WRITTEN / $BYTES_PER_TB" | bc) | |
# Output results... | |
echo "------------------------------" | |
echo " SSD Status: $SSD_DEVICE" | |
echo "------------------------------" | |
echo " On time: $(echo $ON_TIME | sed ':a;s/\B[0-9]\{3\}\>/,&/;ta') hr" | |
echo "------------------------------" | |
echo " Data written:" | |
echo " MB: $(echo $MB_WRITTEN | sed ':a;s/\B[0-9]\{3\}\>/,&/;ta')" | |
echo " GB: $(echo $GB_WRITTEN | sed ':a;s/\B[0-9]\{3\}\>/,&/;ta')" | |
echo " TB: $(echo $TB_WRITTEN | sed ':a;s/\B[0-9]\{3\}\>/,&/;ta')" | |
echo "------------------------------" | |
echo " Mean write rate:" | |
echo " MB/hr: $(echo "scale=3; $MB_WRITTEN / $ON_TIME" | bc | sed ':a;s/\B[0-9]\{3\}\>/,&/;ta')" | |
echo "------------------------------" | |
echo " Drive health: ${WEAR_COUNT} %" | |
echo "------------------------------" |
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