script periodically polls drivestates with hdparm to show when drives go to sleep

drivesleep

#!/bin/bash

# The MIT License (MIT)
#
# Copyright (c) 2016 Anton Semjonov
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.

# script to see when a drive goes to sleep / wakes up

is_num() { [ "$1" != "" ] && [[ $1 =~ ^[0-9]+$ ]] || { echo "'$1' is not a valid number."; exit 10; }; }
is_disk() { hdparm -I "$1" &>/dev/null || { echo "'$1' is not a valid drive for hdparm."; exit 11; }; }

timestamp() {
    if [ "$starttime_epoch" == "" ]; then
        starttime_epoch="$(date +%s)"
    else
        sec_since_start="$((($(date +%s)-$starttime_epoch)))"
        clock_since_start="$(date -ud "@$sec_since_start" "+%Hh %Mm %Ss")"
        echo -n "+ $clock_since_start"
    fi
} 

marker_active="█"
marker_sleeps="░"
marker_failed="╳"

get_drive_state() {
    case $(hdparm -C "$1" 2>&1 | grep "drive state" | sed 's/ drive state is:[[:space:]]*//') in
        "active/idle" ) echo -n "$marker_active$pad" ;;
        "standby" )     echo -n "$marker_sleeps$pad" ;;
        * ) echo -n "$marker_failed$pad" ;;
    esac
}

#########

# help
    if [ "$1" == "" ]; then
        echo -e "$0 <cycle> <disks>\n <cycle> is the time in seconds between updates\n <disks> is a space-seperated list of disks to poll"
        exit 99
    fi

# get args
    is_num "$1" && cycle="$1"
    shift; disks=("$@");
    if [ "$disks" != "" ]; then
        command -v hdparm &>/dev/null || { echo "no access to 'hdparm'. try running as superuser?"; exit 13; }
        for dsk in "${disks[@]}"; do is_disk "$dsk"; done
    else echo "no disks given!"; exit 12; fi

# echo debug
    echo "## cycle = $cycle seconds"
    echo "## disks = $disks"
    echo

# header
    margin="$(printf "%40s")"
    pad="  "
    echo "  $marker_active = active  $marker_sleeps = standby  $marker_failed = error"
    
    disknum=0;
    for dsk in "${disks[@]}"; do
        echo -n "$margin"
        ((disknum++)); tmppos=1
        while [ $tmppos -lt $disknum ]; do
            echo -n "│$pad"; ((tmppos++)); done
        echo "╭──╴$dsk"
    done
    echo -n "$margin"; tmppos=1
    while [ $tmppos -le $disknum ]; do
        echo -n "┷$pad"; ((tmppos++)); done
    echo -ne "\n"

# get state
    timestamp
    while true; do
        
        echo -n "$(date "+%F %T")  ($(timestamp))    "

        for disk in "${disks[@]}"; do get_drive_state "$disk"; done
        
        echo
        sleep $cycle
    done