0README.md

Shows a nice overview of ssd life

Sourced from

• https://scottlinux.com/2014/07/15/determine-remaining-ssd-life-in-linux/
• https://askubuntu.com/questions/865792/how-can-i-monitor-the-tbw-on-my-samsung-ssd

ssd_life /dev/sda
------------------------------
 SSD Status:   /dev/sda
 SSD Model:    Samsung SSD 860 PRO 512GB
 SSD Serial:   xxxxxxxxx
------------------------------
 On time:      9,063 hr
------------------------------
 Data written:
           MB: 121,587,280.707
           GB: 118,737.578
           TB: 115.954
------------------------------
 Mean write rate:
        MB/hr: 13,415.787
------------------------------
 Drive health: 80 %
------------------------------

ssd_life.sh

#!/bin/bash

#######################################
# Variables                           #
#######################################

SSD_DEVICE=${1:-"/dev/sda"}

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")
DISK_INFO=$(sudo /usr/sbin/smartctl -i "$SSD_DEVICE")

DISK_MODEL=$(echo "$DISK_INFO" | awk 'BEGIN { FS = " *: *" } ; /Device Model/ { print $2 }')
DISK_SERIAL=$(echo "$DISK_INFO" | awk 'BEGIN { FS = " *: *" } ; /Serial Number/ { print $2 }')

# 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 " SSD Model:    $DISK_MODEL"
echo " SSD Serial:   $DISK_SERIAL"
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 "------------------------------"