record SSD smart status to a file on startup and suspend

0ssd_smart.service

[Unit]
Description=Record SSD smart status
Before=suspend.target

[Service]
Type=oneshot
ExecStart=/opt/scripts/ssd-monitor.sh
RemainAfterExit=no

[Install]
WantedBy=sleep.target multi-user.target

sample results

2015-10-04 10:39:04	56	32h+52m+07.640s	38	269.469 GB	197.531 GB	240 GB
2015-10-04 10:39:06	56	32h+52m+07.860s	38	269.469 GB	197.531 GB	240 GB
2015-10-04 10:39:07	56	32h+52m+07.900s	38	269.469 GB	197.531 GB	240 GB

ssd-smart.sh

#!/bin/sh
# @Author: lance
# @Date:   2015-10-04 02:36:35
# @Last Modified by:   lance
# @Last Modified time: 2015-10-04 10:38:46
# @Description Save SSD status in a file

# deine the ssd list
ssd_list=(sda sdb)
# dedine where to save the records
rec_path=/var/lib/ssd

my_date=$(date "+%Y-%m-%d %H:%M:%S" )

for ssd in "${ssd_list[@]}"; do
    ssd_status=$(smartctl -a /dev/$ssd)

	power_cycle=$(echo "${ssd_status}"| awk '/^ 12/ {print $10 } ')
	power_time=$(echo "${ssd_status}" | awk '/^  9/ {print $10 } ')
    temp=$(echo "${ssd_status}"| awk '/Temperature_/ {print $10 } ') #Reg of temp maybe 190 or 192
	total_write=$(echo "${ssd_status}" | awk '/^241/ {print $10 * 32 / 1024, "GB" } ')
	total_read=$(echo "${ssd_status}"  | awk '/^242/ {print $10 * 32 / 1024, "GB" } ')
	nand_write=$(echo "${ssd_status}"  | awk '/^249/ {print $10, "GB" } ')

	mkdir -p $rec_path
	printf '%s\t%s\t%s\t%s\t%s\t%s\t%s\n' "$my_date" "$power_cycle" "$power_time" "$temp" "$total_write" "$total_read" "$nand_write" >> "${rec_path}/${ssd}.xls"
done