Block device leaderboard

blkleaderboard.sh

#!/bin/bash

# Paste at shell prompt (or download and execute) and get:
#
#     sdc   9936 hours ( 1.13 years) 3.49TiB SAMSUNG MZ7KH3T8
# nvme0n1   9936 hours ( 1.13 years) 3.49TiB SAMSUNG MZQLB3T8HALS-00007
#     sde   9932 hours ( 1.13 years) 4.55TiB ST5000LM000-2AN1
#     sdd   9931 hours ( 1.13 years) 4.55TiB ST5000LM000-2AN1
#     sdb   9617 hours ( 1.09 years) 0.01TiB SuperMicro SSD
#     sda   9616 hours ( 1.09 years) 0.01TiB SuperMicro SSD
#
# Requires: smartctl, lslbk and GNU bc.
#
# smartctl produces entirely different output for nvme vs ATA, hence the
# horrible awk. Improvements welcome.

# -e 7 excludes loop devices.
lsblk -e 7 -bdno NAME,SIZE |
    while read -r dev size; do
        model=$(<"/sys/block/${dev}/device/model");
        hours=$(sudo smartctl -l devstat "/dev/${dev}" 2>/dev/null |
            awk '/^0x01[[:space:]]+0x010/ { print $4 }');
        [[ -z "$hours" || "$hours" = 0 ]] \
            && hours=$(sudo smartctl -a "/dev/${dev}" |
            awk '
                /^Power On Hours:/ {
                    gsub(/h.*/, "", $NF);
                    gsub(/,/, "", $NF);
                    print $NF
                }
                /Power_On_Hours/ {
                    gsub(/h.*/, "", $10);
                    print $10
                }');
        years=$(bc <<< "scale=2; $hours / 24 / 365.25");
        size_tib=$(bc <<< "scale=4; x=$size / 1099511627776; if(x<1) print 0; x");
        printf "%8s %6d hours (%5.2f years) %.2fTiB %s\\n" \
            "$dev" "$hours" "$years" "$size_tib" "$model";
    done | sort -rnk 2